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  <xs:element id="cna_InvestmentsAndDerivativesRealizedGainLoss" abstract="false" name="InvestmentsAndDerivativesRealizedGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="cna_MiddleMarketsMember" abstract="true" name="MiddleMarketsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="cna_ComponentsOfNetOtherThanTemporaryImpairmentLossesRecognizedInEarningsByAssetTypeTableTextBlock" abstract="false" name="ComponentsOfNetOtherThanTemporaryImpairmentLossesRecognizedInEarningsByAssetTypeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
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  <xs:element id="cna_DebtToValueRatioEqualTo55To65PercentMember" abstract="true" name="DebtToValueRatioEqualTo55To65PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="cna_RetroactiveReinsuranceBenefitRecognized" abstract="false" name="RetroactiveReinsuranceBenefitRecognized" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="cna_MortgageLoansOnRealEstateCommercialAndConsumerAllowanceForCreditLoss" abstract="false" name="MortgageLoansOnRealEstateCommercialAndConsumerAllowanceForCreditLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="cna_EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForTheReclassificationOfReservesForPolicyholdersOnClaimToFuturePolicyBenefitsMember" abstract="true" name="EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForTheReclassificationOfReservesForPolicyholdersOnClaimToFuturePolicyBenefitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="cna_CommonStockAndCommonStockEquivalentsAbstract" abstract="true" name="CommonStockAndCommonStockEquivalentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_DebtServiceCoverageRatioGreaterThanOrEqualto1.6Member" abstract="true" name="DebtServiceCoverageRatioGreaterThanOrEqualto1.6Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="cna_IncomeTaxExpenseBenefitOnOperatingIncomeLoss" abstract="false" name="IncomeTaxExpenseBenefitOnOperatingIncomeLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="cna_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAmortizationOfDiscount" abstract="false" name="LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAmortizationOfDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="cna_BasicAndDilutedPerShareAbstract" abstract="true" name="BasicAndDilutedPerShareAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cna_ExternalCreditRatingUSGovernmentGovernmentAgenciesAndGovernmentSponsoredEnterprisesMember" abstract="true" name="ExternalCreditRatingUSGovernmentGovernmentAgenciesAndGovernmentSponsoredEnterprisesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
</XBRL>