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  <xsd:element id="cna_Pretaximpactofdeferredretroactivereinsurancebenefit" name="Pretaximpactofdeferredretroactivereinsurancebenefit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_ProfessionalManagementLiabilityMember" name="ProfessionalManagementLiabilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cna_ProvisionforuncollectiblethirdpartyreinsuranceonAEP" name="ProvisionforuncollectiblethirdpartyreinsuranceonAEP" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_RateMember" name="RateMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cna_ReductionOfNetUnrealizedGainsOnInvestmentsIncludedInAociDueToShadowAdjustments" name="ReductionOfNetUnrealizedGainsOnInvestmentsIncludedInAociDueToShadowAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="cna_ReinsurancePremiumPaidToNicoUnderAepLossPortfolioTransfer" name="ReinsurancePremiumPaidToNicoUnderAepLossPortfolioTransfer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cna_Retroactivereinsurancebenefitrecognized" name="Retroactivereinsurancebenefitrecognized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_RevenuesByLineOfBusinessAbstract" name="RevenuesByLineOfBusinessAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_ScheduleOfAvailableForSaleAndTradingSecuritiesTable" name="ScheduleOfAvailableForSaleAndTradingSecuritiesTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_ShorttermInvestandotherMember" name="ShorttermInvestandotherMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_SmallBusinessMember" name="SmallBusinessMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_SpecialtyDomain" name="SpecialtyDomain" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_SpecialtyMember" name="SpecialtyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cna_StockBasedCompensation" name="StockBasedCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="cna_StockBasedCompensationAndOther" name="StockBasedCompensationAndOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_SuretyMember" name="SuretyMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="cna_TotalPretaxFavorableUnfavorableNetPriorYearDevelopmentExcludingLifeGroup" name="TotalPretaxFavorableUnfavorableNetPriorYearDevelopmentExcludingLifeGroup" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="cna_TotalconsiderationpaidtoNICOunderAEPLossPortfolioTransfer" name="TotalconsiderationpaidtoNICOunderAEPLossPortfolioTransfer" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="cna_Unfavorabledevelopmentinotherprofessionalliabilityandmanagementliabilityrelatedtolowerthanexpectedseverityforprofessionalservicesprimarilyinaccidentyears2012through2014" name="Unfavorabledevelopmentinotherprofessionalliabilityandmanagementliabilityrelatedtolowerthanexpectedseverityforprofessionalservicesprimarilyinaccidentyears2012through2014" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_WarrantyAlternativeRisksMember" name="WarrantyAlternativeRisksMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="cna_WeightedAverageNumberOfSharesOustandingBasicAndDilutedAbstract" name="WeightedAverageNumberOfSharesOustandingBasicAndDilutedAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
</xsd:schema>
</XBRL>