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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="Assets_totalLabel_labelfr" xml:lang="fr">Total Actifs</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Assets" xlink:to="Assets_totalLabel_labelfr" xlink:type="arc" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="CashAndCashEquivalents_periodEndLabel_labelfr" xml:lang="fr">Trésorerie et équivalents de trésorerie fin de période</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CashAndCashEquivalents" xlink:to="CashAndCashEquivalents_periodEndLabel_labelfr" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="CashAndCashEquivalents_periodStartLabel_labelfr" xml:lang="fr">Trésorerie et équivalents de trésorerie début de période</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CashAndCashEquivalents" xlink:to="CashAndCashEquivalents_periodStartLabel_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="ComprehensiveIncome" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ComprehensiveIncome" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="ComprehensiveIncome_totalLabel_labelfr" xml:lang="fr">Total Résultat global</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ComprehensiveIncome" xlink:to="ComprehensiveIncome_totalLabel_labelfr" xlink:type="arc" />
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    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="Equity_periodEndLabel_labelfr" xml:lang="fr">Capitaux propres fin de période</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Equity" xlink:to="Equity_periodEndLabel_labelfr" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="Equity_periodStartLabel_labelfr" xml:lang="fr">Capitaux propres début de période</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Equity" xlink:to="Equity_periodStartLabel_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="EquityAndLiabilities" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EquityAndLiabilities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="EquityAndLiabilities_totalLabel_labelfr" xml:lang="fr">Total Capitaux propres et passifs</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquityAndLiabilities" xlink:to="EquityAndLiabilities_totalLabel_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_netLabel_labelfr" xml:lang="fr">Augmentation (diminution) nette de la trésorerie et des équivalents de trésorerie avant effet des variations des taux de change</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:to="IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_netLabel_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="IncreaseDecreaseInCashAndCashEquivalents" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="IncreaseDecreaseInCashAndCashEquivalents_periodStartLabel_labelfr" xml:lang="fr">Augmentation (diminution) nette de la trésorerie et des équivalents de trésorerie à l'ouverture</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreaseDecreaseInCashAndCashEquivalents" xlink:to="IncreaseDecreaseInCashAndCashEquivalents_periodStartLabel_labelfr" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="IncreaseDecreaseInCashAndCashEquivalents_periodEndLabel_labelfr" xml:lang="fr">Augmentation (diminution) nette de la trésorerie et des équivalents de trésorerie à la cloture</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreaseDecreaseInCashAndCashEquivalents" xlink:to="IncreaseDecreaseInCashAndCashEquivalents_periodEndLabel_labelfr" xlink:type="arc" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="IncreaseDecreaseInCashAndCashEquivalents_netLabel_labelfr" xml:lang="fr">Augmentation (diminution) nette de la trésorerie et des équivalents de trésorerie</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreaseDecreaseInCashAndCashEquivalents" xlink:to="IncreaseDecreaseInCashAndCashEquivalents_netLabel_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="CapitalincreaseDecreaseReceivedPaidAndOtherChangesInEquity" xlink:href="MERSEN-2021-12-31.xsd#mersen_CapitalincreaseDecreaseReceivedPaidAndOtherChangesInEquity" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="CapitalincreaseDecreaseReceivedPaidAndOtherChangesInEquity_label_labelfr" xml:lang="fr">Augmentation/réduction de capital reçue / versée et autres variations des capitaux propres</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CapitalincreaseDecreaseReceivedPaidAndOtherChangesInEquity" xlink:to="CapitalincreaseDecreaseReceivedPaidAndOtherChangesInEquity_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserveMember" xlink:href="MERSEN-2021-12-31.xsd#mersen_RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserveMember" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserveMember_label_labelfr" xml:lang="fr">Primes et réserves</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserveMember" xlink:to="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserveMember_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="CashFlowsFromUsedInObtainingLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:href="MERSEN-2021-12-31.xsd#mersen_CashFlowsFromUsedInObtainingLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="CashFlowsFromUsedInObtainingLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_label_labelfr" xml:lang="fr">Variation de périmètre</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CashFlowsFromUsedInObtainingLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:to="CashFlowsFromUsedInObtainingLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="AdministrativeAndResearchExpense" xlink:href="MERSEN-2021-12-31.xsd#mersen_AdministrativeAndResearchExpense" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="AdministrativeAndResearchExpense_label_labelfr" xml:lang="fr">Frais administratifs centraux et de recherche</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AdministrativeAndResearchExpense" xlink:to="AdministrativeAndResearchExpense_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="OtherOperatingExpensesFromOrdinaryActivities" xlink:href="MERSEN-2021-12-31.xsd#mersen_OtherOperatingExpensesFromOrdinaryActivities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="OtherOperatingExpensesFromOrdinaryActivities_label_labelfr" xml:lang="fr">Autres charges d’exploitation</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherOperatingExpensesFromOrdinaryActivities" xlink:to="OtherOperatingExpensesFromOrdinaryActivities_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="RetainedEarningsProfitLossForReportingPeriod" xlink:href="MERSEN-2021-12-31.xsd#mersen_RetainedEarningsProfitLossForReportingPeriod" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="RetainedEarningsProfitLossForReportingPeriod_label_labelfr" xml:lang="fr">Résultat net de l’exercice</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetainedEarningsProfitLossForReportingPeriod" xlink:to="RetainedEarningsProfitLossForReportingPeriod_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="ProfitLossFromOrdinaryOperatingActivities" xlink:href="MERSEN-2021-12-31.xsd#mersen_ProfitLossFromOrdinaryOperatingActivities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="ProfitLossFromOrdinaryOperatingActivities_label_labelfr" xml:lang="fr">RÉSULTAT OPÉRATIONNEL COURANT</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProfitLossFromOrdinaryOperatingActivities" xlink:to="ProfitLossFromOrdinaryOperatingActivities_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="CashFlowsFromUsedInOperatingAndInvestingActivities" xlink:href="MERSEN-2021-12-31.xsd#mersen_CashFlowsFromUsedInOperatingAndInvestingActivities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="CashFlowsFromUsedInOperatingAndInvestingActivities_label_labelfr" xml:lang="fr">FLUX DE TRÉSORERIE PROVENANT DES ACTIVITÉS OPÉRATIONNELLES ET D’INVESTISSEMENTS</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CashFlowsFromUsedInOperatingAndInvestingActivities" xlink:to="CashFlowsFromUsedInOperatingAndInvestingActivities_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="CashInflowsOutflowsRelatedToBorrowingsExcludingLeases" xlink:href="MERSEN-2021-12-31.xsd#mersen_CashInflowsOutflowsRelatedToBorrowingsExcludingLeases" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="CashInflowsOutflowsRelatedToBorrowingsExcludingLeases_label_labelfr" xml:lang="fr">Variation de l’endettement</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CashInflowsOutflowsRelatedToBorrowingsExcludingLeases" xlink:to="CashInflowsOutflowsRelatedToBorrowingsExcludingLeases_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="BankOverdraftsClassifiedAsFinancialLiabilities" xlink:href="MERSEN-2021-12-31.xsd#mersen_BankOverdraftsClassifiedAsFinancialLiabilities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="BankOverdraftsClassifiedAsFinancialLiabilities_label_labelfr" xml:lang="fr"> Concours bancaires courants</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BankOverdraftsClassifiedAsFinancialLiabilities" xlink:to="BankOverdraftsClassifiedAsFinancialLiabilities_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="OtherOperatingExpensesFromNonOrdinaryActivities" xlink:href="MERSEN-2021-12-31.xsd#mersen_OtherOperatingExpensesFromNonOrdinaryActivities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="OtherOperatingExpensesFromNonOrdinaryActivities_label_labelfr" xml:lang="fr">Charges non courantes</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherOperatingExpensesFromNonOrdinaryActivities" xlink:to="OtherOperatingExpensesFromNonOrdinaryActivities_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="FinancialCurrentAccounts" xlink:href="MERSEN-2021-12-31.xsd#mersen_FinancialCurrentAccounts" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="FinancialCurrentAccounts_label_labelfr" xml:lang="fr"> Comptes courants financiers</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FinancialCurrentAccounts" xlink:to="FinancialCurrentAccounts_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="PurchaseOfPropertyPlantAndEquipmentAdjustedForIncreaseDecreaseInLiabilitiesToSuppliersOfFixedAssets" xlink:href="MERSEN-2021-12-31.xsd#mersen_PurchaseOfPropertyPlantAndEquipmentAdjustedForIncreaseDecreaseInLiabilitiesToSuppliersOfFixedAssets" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="PurchaseOfPropertyPlantAndEquipmentAdjustedForIncreaseDecreaseInLiabilitiesToSuppliersOfFixedAssets_label_labelfr" xml:lang="fr">Immobilisations corporelles</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PurchaseOfPropertyPlantAndEquipmentAdjustedForIncreaseDecreaseInLiabilitiesToSuppliersOfFixedAssets" xlink:to="PurchaseOfPropertyPlantAndEquipmentAdjustedForIncreaseDecreaseInLiabilitiesToSuppliersOfFixedAssets_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserve" xlink:href="MERSEN-2021-12-31.xsd#mersen_RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserve" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserve_label_labelfr" xml:lang="fr">Réserves</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserve" xlink:to="RetainedEarningsExcludingProfitLossForReportingperiodAndOtherReserve_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="PurchaseOfIntangibleAssetsAdjustedForIncreaseDecreaseInLiabilitiestoSuppliersOfAssets" xlink:href="MERSEN-2021-12-31.xsd#mersen_PurchaseOfIntangibleAssetsAdjustedForIncreaseDecreaseInLiabilitiestoSuppliersOfAssets" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="PurchaseOfIntangibleAssetsAdjustedForIncreaseDecreaseInLiabilitiestoSuppliersOfAssets_label_labelfr" xml:lang="fr">Immobilisations incorporelles</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PurchaseOfIntangibleAssetsAdjustedForIncreaseDecreaseInLiabilitiestoSuppliersOfAssets" xlink:to="PurchaseOfIntangibleAssetsAdjustedForIncreaseDecreaseInLiabilitiestoSuppliersOfAssets_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="IssueReductionOfEquity" xlink:href="MERSEN-2021-12-31.xsd#mersen_IssueReductionOfEquity" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="IssueReductionOfEquity_label_labelfr" xml:lang="fr">Augmentation de capital/réduction de capital</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IssueReductionOfEquity" xlink:to="IssueReductionOfEquity_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="OtherOperatingIncomeFromNonOrdinaryActivities" xlink:href="MERSEN-2021-12-31.xsd#mersen_OtherOperatingIncomeFromNonOrdinaryActivities" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="OtherOperatingIncomeFromNonOrdinaryActivities_label_labelfr" xml:lang="fr">Produits non courants</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherOperatingIncomeFromNonOrdinaryActivities" xlink:to="OtherOperatingIncomeFromNonOrdinaryActivities_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="RetainedEarningsProfitLossForReportingPeriodMember" xlink:href="MERSEN-2021-12-31.xsd#mersen_RetainedEarningsProfitLossForReportingPeriodMember" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="RetainedEarningsProfitLossForReportingPeriodMember_label_labelfr" xml:lang="fr">Résultats</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RetainedEarningsProfitLossForReportingPeriodMember" xlink:to="RetainedEarningsProfitLossForReportingPeriodMember_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="AmortizationOfRevaluedIntangibleAssets" xlink:href="MERSEN-2021-12-31.xsd#mersen_AmortizationOfRevaluedIntangibleAssets" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="AmortizationOfRevaluedIntangibleAssets_label_labelfr" xml:lang="fr">Amortissement des actifs incorporels réévalués</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmortizationOfRevaluedIntangibleAssets" xlink:to="AmortizationOfRevaluedIntangibleAssets_label_labelfr" xlink:type="arc" />
    <link:loc xlink:type="locator" xlink:label="IncreaseDecreaseInLiabilitiestoSuppliersOfAssets" xlink:href="MERSEN-2021-12-31.xsd#mersen_IncreaseDecreaseInLiabilitiestoSuppliersOfAssets" />
    <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="IncreaseDecreaseInLiabilitiestoSuppliersOfAssets_label_labelfr" xml:lang="fr">Fournisseurs d’immobilisations</link:label>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="IncreaseDecreaseInLiabilitiestoSuppliersOfAssets" xlink:to="IncreaseDecreaseInLiabilitiestoSuppliersOfAssets_label_labelfr" xlink:type="arc" />
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