<?xml version="1.0" encoding="us-ascii"?>
<!--XBRL document created with Bowne Tagger. XBRL Parser version 10.0.0.97-->
<!--Based on XBRL 2.1-->
<!--Modified on: 11/3/2011 5:47:05 PM-->
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" targetNamespace="http://chubb.com/20110930" xmlns:cb="http://chubb.com/20110930" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" elementFormDefault="qualified" attributeFormDefault="unqualified" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <annotation>
    <appinfo>
      <link:roleType roleURI="http://chubb.com/role/AccountingPronouncementsNotYetAdoptedDetailsTextual" id="AccountingPronouncementsNotYetAdoptedDetailsTextual">
        <link:definition>0602 - Disclosure - Accounting Pronouncements Not Yet Adopted (Details Textual)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsDetailsAlternateCalc2" id="InvestedAssetsDetailsAlternateCalc2">
        <link:definition>060301 - Disclosure - Invested Assets (Details) alternate calc2</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeTables" id="InvestedAssetsAndRelatedIncomeTables">
        <link:definition>0503 - Disclosure - Invested Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeDetails7" id="InvestedAssetsAndRelatedIncomeDetails7">
        <link:definition>06036 - Disclosure - Invested Assets (Details 6)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeDetails6" id="InvestedAssetsAndRelatedIncomeDetails6">
        <link:definition>06035 - Disclosure - Invested Assets (Details 5)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeDetails4" id="InvestedAssetsAndRelatedIncomeDetails4">
        <link:definition>06034 - Disclosure - Invested Assets (Details 4)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeDetails3" id="InvestedAssetsAndRelatedIncomeDetails3">
        <link:definition>06033 - Disclosure - Invested Assets (Details 3)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeDetails2" id="InvestedAssetsAndRelatedIncomeDetails2">
        <link:definition>06032 - Disclosure - Invested Assets (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeDetails1" id="InvestedAssetsAndRelatedIncomeDetails1">
        <link:definition>06031 - Disclosure - Invested Assets (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncomeDetails" id="InvestedAssetsAndRelatedIncomeDetails">
        <link:definition>0603 - Disclosure - Invested Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/InvestedAssetsAndRelatedIncome" id="InvestedAssetsAndRelatedIncome">
        <link:definition>0203 - Disclosure - Invested Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/AccountingPronouncementsNotYetAdopted" id="AccountingPronouncementsNotYetAdopted">
        <link:definition>0202 - Disclosure - Accounting Pronouncements Not Yet Adopted</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/ContingentLiabilities" id="ContingentLiabilities">
        <link:definition>0206 - Disclosure - Contingent Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/General" id="General">
        <link:definition>0201 - Disclosure - General</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/SegmentsInformationDetails1" id="SegmentsInformationDetails1">
        <link:definition>06051 - Disclosure - Segments Information (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/FairValuesOfFinancialInstrumentsDetails3" id="FairValuesOfFinancialInstrumentsDetails3">
        <link:definition>06042 - Disclosure - Fair Values of Financial Instruments (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/FairValuesOfFinancialInstruments" id="FairValuesOfFinancialInstruments">
        <link:definition>0204 - Disclosure - Fair Values of Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/ConsolidatedStatementsOfCashFlows" id="ConsolidatedStatementsOfCashFlows">
        <link:definition>0140 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/ConsolidatedStatementsOfComprehensiveIncome" id="ConsolidatedStatementsOfComprehensiveIncome">
        <link:definition>0130 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/ConsolidatedBalanceSheetsParenthetical" id="ConsolidatedBalanceSheetsParenthetical">
        <link:definition>0121 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/ConsolidatedBalanceSheets" id="ConsolidatedBalanceSheets">
        <link:definition>0120 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/ConsolidatedStatementsOfIncome" id="ConsolidatedStatementsOfIncome">
        <link:definition>0110 - Statement - CONSOLIDATED STATEMENTS OF INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/FairValuesOfFinancialInstrumentsDetails1" id="FairValuesOfFinancialInstrumentsDetails1">
        <link:definition>06041 - Disclosure - Fair Values of Financial Instruments (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/FairValuesOfFinancialInstrumentsTables" id="FairValuesOfFinancialInstrumentsTables">
        <link:definition>0504 - Disclosure - Fair Values of Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/FairValuesOfFinancialInstrumentsDetails" id="FairValuesOfFinancialInstrumentsDetails">
        <link:definition>0604 - Disclosure - Fair Values of Financial Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/SegmentsInformationDetails" id="SegmentsInformationDetails">
        <link:definition>0605 - Disclosure - Segments Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/SegmentsInformationTables" id="SegmentsInformationTables">
        <link:definition>0505 - Disclosure - Segments Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/SegmentsInformation" id="SegmentsInformation">
        <link:definition>0205 - Disclosure - Segments Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/EarningsPerShareDetails" id="EarningsPerShareDetails">
        <link:definition>0607 - Disclosure - Earnings Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/EarningsPerShareTables" id="EarningsPerShareTables">
        <link:definition>0507 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/EarningsPerShare" id="EarningsPerShare">
        <link:definition>0207 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://chubb.com/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
        <link:definition>00 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:type="simple" xlink:href="cb-20110930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:href="cb-20110930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Calculation Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:href="cb-20110930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:href="cb-20110930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links, all" />
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2011-01-31" schemaLocation="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd" />
  <import namespace="http://fasb.org/us-gaap/2011-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd" />
  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <import namespace="http://xbrl.sec.gov/currency/2011-01-31" schemaLocation="http://xbrl.sec.gov/currency/2011/currency-2011-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/naics/2011-01-31" schemaLocation="http://xbrl.sec.gov/naics/2011/naics-2011-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/exch/2011-01-31" schemaLocation="http://xbrl.sec.gov/exch/2011/exch-2011-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/stpr/2011-01-31" schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/country/2011-01-31" schemaLocation="http://xbrl.sec.gov/country/2011/country-2011-01-31.xsd" />
  <element id="cb_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_OtherInvestedAssets" name="OtherInvestedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_LossesAndExpenses" name="LossesAndExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_CorporateExpenses" name="CorporateExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_TaxExemptCost" name="TaxExemptCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_TaxExemptGrossUnrealizedAppreciation" name="TaxExemptGrossUnrealizedAppreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_TaxExemptGrossUnrealizedDepreciation" name="TaxExemptGrossUnrealizedDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cb_TaxExempt" name="TaxExempt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_TaxableCost" name="TaxableCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_TaxableGrossUnrealizedAppreciation" name="TaxableGrossUnrealizedAppreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_TaxableGrossUnrealizedDepreciation" name="TaxableGrossUnrealizedDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cb_Taxable" name="Taxable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_FixedMaturitiesGrossUnrealizedAppreciation" name="FixedMaturitiesGrossUnrealizedAppreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_FixedMaturitiesGrossUnrealizedDepreciation" name="FixedMaturitiesGrossUnrealizedDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cb_EquitySecuritiesGrossUnrealizedAppreciation" name="EquitySecuritiesGrossUnrealizedAppreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_EquitySecuritiesGrossUnrealizedDepreciation" name="EquitySecuritiesGrossUnrealizedDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cb_AmortizedCostAndFairValueOfFixedMaturitiesByContractualMaturityAbstract" name="AmortizedCostAndFairValueOfFixedMaturitiesByContractualMaturityAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_FixedMaturitiesAndEquitySecuritiesUnrealizedAppreciationDepreciationNetOfTax" name="FixedMaturitiesAndEquitySecuritiesUnrealizedAppreciationDepreciationNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_DeferredIncomeTaxAssetLiability" name="DeferredIncomeTaxAssetLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cb_EquitySecuritiesUnrealizedAppreciationDepreciationNet" name="EquitySecuritiesUnrealizedAppreciationDepreciationNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_FixedMaturitiesUnrealizedAppreciationDepreciationNet" name="FixedMaturitiesUnrealizedAppreciationDepreciationNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_FixedMaturitiesChangeInUnrealizedAppreciationOrDepreciation" name="FixedMaturitiesChangeInUnrealizedAppreciationOrDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_EquitySecuritiesChangeInUnrealizedAppreciationOrDepreciation" name="EquitySecuritiesChangeInUnrealizedAppreciationOrDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_GrossRealizedGainsFixedMaturities" name="GrossRealizedGainsFixedMaturities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_GrossRealizedLossesFixedMaturities" name="GrossRealizedLossesFixedMaturities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_ImpairmentOfInvestmentsFixedMaturities" name="ImpairmentOfInvestmentsFixedMaturities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_GrossRealizedGainsEquitySecurities" name="GrossRealizedGainsEquitySecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_ImpairmentOfInvestmentsEquitySecurities" name="ImpairmentOfInvestmentsEquitySecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_OtherInvestedAssetsGainLoss" name="OtherInvestedAssetsGainLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_FixedMaturitiesOtherThanTemporaryImpairmentLossesInGrossUnrealizedDepreciation" name="FixedMaturitiesOtherThanTemporaryImpairmentLossesInGrossUnrealizedDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_IndividualFixedMaturityAndEquitySecuritiesInUnrealizedLossPosition" name="IndividualFixedMaturityAndEquitySecuritiesInUnrealizedLossPosition" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="cb_IndividualFixedMaturitiesInUnrealizedLossPosition" name="IndividualFixedMaturitiesInUnrealizedLossPosition" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="cb_CumulativeCreditLossesRecognizedInNetIncome" name="CumulativeCreditLossesRecognizedInNetIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_PropertyAndCasualtyInsuranceMember" name="PropertyAndCasualtyInsuranceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_PremiumsEarnedFromInsurance" name="PremiumsEarnedFromInsurance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_PremiumsEarnedFromReinsuranceAssumed" name="PremiumsEarnedFromReinsuranceAssumed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_PropertyAndCasualtyInsuranceRevenues" name="PropertyAndCasualtyInsuranceRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_CorporateAndOtherRevenues" name="CorporateAndOtherRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_InsuranceUnderwritingIncome" name="InsuranceUnderwritingIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_ReinsuranceAssumedUnderwritingIncome" name="ReinsuranceAssumedUnderwritingIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_UnderwritingIncome" name="UnderwritingIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_PropertyAndCasualtyInsuranceIncomeBeforeTaxesAndCorporateCompanies" name="PropertyAndCasualtyInsuranceIncomeBeforeTaxesAndCorporateCompanies" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_CorporateAndOtherIncomeLoss" name="CorporateAndOtherIncomeLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_CarryingValuesAndFairValuesOfFinancialInstrumentsAbstract" name="CarryingValuesAndFairValuesOfFinancialInstrumentsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_FairValuesOfFinancialInstrumentsTextualAbstract" name="FairValuesOfFinancialInstrumentsTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_PercentageOfFairValueAmountsForFixedMaturitiesProvidedByPricingService" name="PercentageOfFairValueAmountsForFixedMaturitiesProvidedByPricingService" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="cb_ChangeInNetPayableReceivableFromSecurityTransactionsNotSettled" name="ChangeInNetPayableReceivableFromSecurityTransactionsNotSettled" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_LossesAndExpensesAbstract" name="LossesAndExpensesAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_AmortizedCostAndFairValueOfInvestedAssetsAbstract" name="AmortizedCostAndFairValueOfInvestedAssetsAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_GrossGainLossOttiEquitySecurities" name="GrossGainLossOttiEquitySecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_PropertyAndCasualtyInsuranceAxis" name="PropertyAndCasualtyInsuranceAxis" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" />
  <element id="cb_PropertyAndCasualtyInsuranceDomain" name="PropertyAndCasualtyInsuranceDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_IncomeLossBeforeIncomeTaxAbstract" name="IncomeLossBeforeIncomeTaxAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_GrossGainLossOttiFixedMaturities" name="GrossGainLossOttiFixedMaturities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_GrossRealizedLossesEquitySecurities" name="GrossRealizedLossesEquitySecurities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cb_TaxExemptMember" name="TaxExemptMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_TaxableMember" name="TaxableMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_DeferredTaxLiabilitiesNet" name="DeferredTaxLiabilitiesNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cb_SpecialtyInsuranceMember" name="SpecialtyInsuranceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_AvailableForSaleDebtAndEquitySecuritiesDisclosureTextBlock" name="AvailableForSaleDebtAndEquitySecuritiesDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_ChangeInUnrealizedAppreciationOrDepreciationOfInvestmentsCarriedAtFairValueTableTextBlock" name="ChangeInUnrealizedAppreciationOrDepreciationOfInvestmentsCarriedAtFairValueTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_AccountingPronouncementsNotYetAdoptedAbstract" name="AccountingPronouncementsNotYetAdoptedAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_UnderwritingIncomeBeforeDeferredPolicyAcquisitionCosts" name="UnderwritingIncomeBeforeDeferredPolicyAcquisitionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_AvailableForSaleSecuritiesDebtMaturitiesExcludingMortgageBackedSecuritiesFairValue" name="AvailableForSaleSecuritiesDebtMaturitiesExcludingMortgageBackedSecuritiesFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_AvailableForSaleSecuritiesDebtMaturitiesExcludingMortgageBackedSecuritiesAmortizedCost" name="AvailableForSaleSecuritiesDebtMaturitiesExcludingMortgageBackedSecuritiesAmortizedCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cb_OtherIncomeCharges" name="OtherIncomeCharges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_ChangeInUnrealizedOtherThanTemporaryImpairmentLossesOnInvestments" name="ChangeInUnrealizedOtherThanTemporaryImpairmentLossesOnInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cb_InvestedAssetsTextualAbstract" name="InvestedAssetsTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_ExpectedMinimumPercentageReductionOfDeferredPolicyAcquisitionCostsDueToAdoptionOfNewAccountingGuidance" name="ExpectedMinimumPercentageReductionOfDeferredPolicyAcquisitionCostsDueToAdoptionOfNewAccountingGuidance" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="cb_ExpectedMaximumPercentageReductionOfDeferredPolicyAcquisitionCostsDueToAdoptionOfNewAccountingGuidance" name="ExpectedMaximumPercentageReductionOfDeferredPolicyAcquisitionCostsDueToAdoptionOfNewAccountingGuidance" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="cb_AccountingPronouncementsNotYetAdoptedTextualAbstract" name="AccountingPronouncementsNotYetAdoptedTextualAbstract" abstract="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="cb_ExpectedMinimumReductionToShareholdersEquityDueToAdoptionOfNewAccountingGuidance" name="ExpectedMinimumReductionToShareholdersEquityDueToAdoptionOfNewAccountingGuidance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <element id="cb_ExpectedMaximumReductionToShareholdersEquityDueToAdoptionOfNewAccountingGuidance" name="ExpectedMaximumReductionToShareholdersEquityDueToAdoptionOfNewAccountingGuidance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
</schema>
