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  <xs:element id="cna_OtherRevenuesMember" abstract="true" name="OtherRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_ShorttermInvestmentsandOther" abstract="false" name="ShorttermInvestmentsandOther" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseLongTermCarePoliciesPeriodIncreaseDecrease" abstract="false" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseLongTermCarePoliciesPeriodIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ShortDurationContractsNetIncurredClaimsandAllocatedClaimAdjustmentExpensesTableTextBlock" abstract="false" name="ShortDurationContractsNetIncurredClaimsandAllocatedClaimAdjustmentExpensesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_RevenuesExcludingInvestmentsAndDerivativesRealizedGainLoss" abstract="false" name="RevenuesExcludingInvestmentsAndDerivativesRealizedGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_Insuranceclaimsandpolicyholdersbenefitsincludingpolicyholdersdividends" abstract="false" name="Insuranceclaimsandpolicyholdersbenefitsincludingpolicyholdersdividends" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ChangeInShortTermInvestments" abstract="false" name="ChangeInShortTermInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_InvestmentInSubsidiaries" abstract="false" name="InvestmentInSubsidiaries" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ImpairmentsOtherThanTemporaryPolicyTextBlock" abstract="false" name="ImpairmentsOtherThanTemporaryPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_LineOfCreditFacilityExtensionTerm" abstract="false" name="LineOfCreditFacilityExtensionTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cna_WarrantyMember" abstract="true" name="WarrantyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_InsuranceReservesAbstract" abstract="true" name="InsuranceReservesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_SeniorNotes3.950faceamountof550dueMay152024Member" abstract="true" name="SeniorNotes3.950faceamountof550dueMay152024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_Deferredreinsurancebenefityettoberecognized" abstract="false" name="Deferredreinsurancebenefityettoberecognized" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetInvestmentIncomeTableTextBlock" abstract="false" name="NetInvestmentIncomeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_ImpactOfLossPortfolioTransferOnConsolidatedStatementsOfOperationsTableTextBlock" abstract="false" name="ImpactOfLossPortfolioTransferOnConsolidatedStatementsOfOperationsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_ScheduleofOtherIntangibleAssetsAbstract" abstract="true" name="ScheduleofOtherIntangibleAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_NetPriorYearClaimandAllocatedClaimAdjustmentExpenseReserveDevelopment" abstract="false" name="NetPriorYearClaimandAllocatedClaimAdjustmentExpenseReserveDevelopment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ShortDurationContractsNetCumulativePaidClaimAdjustmentExpensesReconciliationofTotalLiabilityforUnpaidClaimandClaimAdjustmentExpenseTableTextBlock" abstract="false" name="ShortDurationContractsNetCumulativePaidClaimAdjustmentExpensesReconciliationofTotalLiabilityforUnpaidClaimandClaimAdjustmentExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_AggregateLimitUnderAepLossPortfolioTransfer" abstract="false" name="AggregateLimitUnderAepLossPortfolioTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_SubsidiariesOfBerkshireHathawayGroupMember" abstract="true" name="SubsidiariesOfBerkshireHathawayGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_GrossAndNetCarriedClaimAndClaimAdjustmentExpenseReservesTableTextBlock" abstract="false" name="GrossAndNetCarriedClaimAndClaimAdjustmentExpenseReservesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_CommercialSegmentMember" abstract="true" name="CommercialSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_CededClaimAndClaimAdjustmentExpenses" abstract="false" name="CededClaimAndClaimAdjustmentExpenses" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_OperatingLossCarryforwardsSubjecttoExpiration" abstract="false" name="OperatingLossCarryforwardsSubjecttoExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ShortDurationContractsNetCumulativePaidClaimAdjustmentExpensesLineItems" abstract="true" name="ShortDurationContractsNetCumulativePaidClaimAdjustmentExpensesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_ReductionsToAllowanceForCreditLossesAbstract" abstract="true" name="ReductionsToAllowanceForCreditLossesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_ScheduleofOtherIntangibleAssetsTableTextBlock" abstract="false" name="ScheduleofOtherIntangibleAssetsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_UnallocatedClaimAdjustmentExpenseDevelopment" abstract="false" name="UnallocatedClaimAdjustmentExpenseDevelopment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentOther" abstract="false" name="NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_AssetsandLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsandLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_DebtServiceCoverageDomain" abstract="true" name="DebtServiceCoverageDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_InvestmentsthatExceedTenPercentofStockholdersEquity" abstract="false" name="InvestmentsthatExceedTenPercentofStockholdersEquity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ReinsurancePremiumsPaid" abstract="false" name="ReinsurancePremiumsPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ReservesBeginningOfYearAbstract" abstract="true" name="ReservesBeginningOfYearAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_MiddleMarketsMember" abstract="true" name="MiddleMarketsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetUnrealizedGainLossIncludedinOtherComprehensiveIncomeLoss" abstract="false" name="FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetUnrealizedGainLossIncludedinOtherComprehensiveIncomeLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_OtherInvestmentIncomeMember" abstract="true" name="OtherInvestmentIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_InternationalSegmentMember" abstract="true" name="InternationalSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_ShortDurationInsuranceContractsNetCumulativePaidClaimandClaimAdjustmentExpensesTable" abstract="true" name="ShortDurationInsuranceContractsNetCumulativePaidClaimandClaimAdjustmentExpensesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="cna_CommitmentsToPurchaseOrFundAdditionalAmounts" abstract="false" name="CommitmentsToPurchaseOrFundAdditionalAmounts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentSurety" abstract="false" name="NetPriorYearClaimAndAllocatedClaimAdjustmentExpenseReserveDevelopmentSurety" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_PercentageOfBilledReceivablesComparedToTotalReinsuranceReceivable" abstract="false" name="PercentageOfBilledReceivablesComparedToTotalReinsuranceReceivable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cna_Amountofinterestrecognizedonthediscountedreservesofunfundedstructuredsettlements" abstract="false" name="Amountofinterestrecognizedonthediscountedreservesofunfundedstructuredsettlements" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_DirectAndCededEarnedPremiumsRelatedToBusinessThatIsOneHundredPercentReinsuredAsResultOfSignificantCaptiveProgram" abstract="false" name="DirectAndCededEarnedPremiumsRelatedToBusinessThatIsOneHundredPercentReinsuredAsResultOfSignificantCaptiveProgram" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_NetRealizedInvestmentGainsLossesContinuingAndDiscontinuingOperations" abstract="false" name="NetRealizedInvestmentGainsLossesContinuingAndDiscontinuingOperations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_LimitedPartnershipEquityRelatedHedgeFundStrategyPlanAssets" abstract="false" name="LimitedPartnershipEquityRelatedHedgeFundStrategyPlanAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cna_PercentageOfLimitedPartnershipsReportedOnOneMonthLag" abstract="false" name="PercentageOfLimitedPartnershipsReportedOnOneMonthLag" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cna_BMinusToBPlusPlusMember" abstract="true" name="BMinusToBPlusPlusMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_DebtToValueRatioLessThan55PercentMember" abstract="true" name="DebtToValueRatioLessThan55PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_InsuranceClaimsandPolicyholdersBenefitsIncludingPolicyholdersDividendsMember" abstract="true" name="InsuranceClaimsandPolicyholdersBenefitsIncludingPolicyholdersDividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_AdditionsToAllowanceForCreditLossesAbstract" abstract="true" name="AdditionsToAllowanceForCreditLossesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_PercentageOfLimitedPartnershipsEmployingHedgeFundStrategiesFocusedOnFixedIncomeAndEquityInvestments" abstract="false" name="PercentageOfLimitedPartnershipsEmployingHedgeFundStrategiesFocusedOnFixedIncomeAndEquityInvestments" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="cna_Amountofinterestaccretionrecognizedonthediscountedreservesofworkerscompensationlifetimeclaimreserves" abstract="false" name="Amountofinterestaccretionrecognizedonthediscountedreservesofworkerscompensationlifetimeclaimreserves" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_CliffVestingPeriodFollowingDateofGrant" abstract="false" name="CliffVestingPeriodFollowingDateofGrant" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="cna_GatewayRiversInsuranceCompanyMember" abstract="true" name="GatewayRiversInsuranceCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_TaxespaidMember" abstract="true" name="TaxespaidMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_ReinsurancePremiumPaidToNicoUnderAepLossPortfolioTransfer" abstract="false" name="ReinsurancePremiumPaidToNicoUnderAepLossPortfolioTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_ShortDurationContractsReserveDevelopmentTableTextBlock" abstract="false" name="ShortDurationContractsReserveDevelopmentTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="cna_Retroactivereinsurancebenefitrecognized" abstract="false" name="Retroactivereinsurancebenefitrecognized" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_CapitalizedAdministratorServiceCostsMember" abstract="true" name="CapitalizedAdministratorServiceCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_CumulativeamountscededunderAEPLossPortfolioTransfer" abstract="false" name="CumulativeamountscededunderAEPLossPortfolioTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_SeniorNotes3450FaceAmountOf500DueAugust152027Member" abstract="true" name="SeniorNotes3450FaceAmountOf500DueAugust152027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="cna_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAndOtherComprehensiveIncomeLoss" abstract="false" name="FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsAndOtherComprehensiveIncomeLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cna_LimitedPartnershipHedgeFundStrategyDistressedInvestmentsPlanAssets" abstract="false" name="LimitedPartnershipHedgeFundStrategyDistressedInvestmentsPlanAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
</xs:schema>
</XBRL>