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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 5HNXKSohzpFnE9pJhVPe4w==

<SEC-DOCUMENT>0001092306-03-000491.txt : 20031021
<SEC-HEADER>0001092306-03-000491.hdr.sgml : 20031021
<ACCEPTANCE-DATETIME>20031021134001
ACCESSION NUMBER:		0001092306-03-000491
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031020
FILED AS OF DATE:		20031021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HARTNACK RICHARD C
		CENTRAL INDEX KEY:			0001191029

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15081
		FILM NUMBER:		03949443

	BUSINESS ADDRESS:	
		STREET 1:		445 SOUTH FIGUEROA STREET
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90071

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNIONBANCAL CORP
		CENTRAL INDEX KEY:			0001011659
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				941234979
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		400 CALIFORNIA STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94104-1476
		BUSINESS PHONE:		4157652969

	MAIL ADDRESS:	
		STREET 1:		400 CALIFORNIA STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94104-1476
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4hartnack_ex.xml
<TEXT>
<XML>
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<!-- - EDGAR Ease Plus 1.0                                   07/25/03  TT    -->
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
   <periodOfReport>2003-10-20</periodOfReport>
   <notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001011659</issuerCik>
        <issuerName>UNIONBANCAL CORP</issuerName>
        <issuerTradingSymbol>UB</issuerTradingSymbol>
   </issuer>
   <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001191029</rptOwnerCik>
            <rptOwnerName>HARTNACK RICHARD C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>445 SOUTH FIGUEROA STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>1</isDirector>
         <isOfficer>0</isOfficer>
         <isTenPercentOwner>0</isTenPercentOwner>
         <isOther>0</isOther>
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   </reportingOwner>
 <nonDerivativeTable>
   <nonDerivativeTransaction>
      <securityTitle>
         <value>Common Stock</value>
      </securityTitle>
      <transactionDate>
         <value>2003-10-20</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>M</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
         <transactionShares>
           <value>8000</value>
         </transactionShares>
         <transactionPricePerShare>
           <value>18.2917</value>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>A</value>
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           <value>8000</value>
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         <transactionCode>M</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
         <transactionShares>
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         </transactionShares>
         <transactionPricePerShare>
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         <transactionAcquiredDisposedCode>
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         <transactionCode>M</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
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           <value>19500</value>
         </transactionShares>
         <transactionPricePerShare>
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         <transactionAcquiredDisposedCode>
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      <transactionDate>
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         <transactionCode>S</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
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           <value>42500</value>
         </transactionShares>
         <transactionPricePerShare>
           <value>52.0027</value>
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   <nonDerivativeHolding>
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         <value>Common Stock</value>
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      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>62610</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
            <value>by trust</value>
            <footnoteId id="F1"/>
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   <nonDerivativeHolding>
      <securityTitle>
         <value>Common Stock</value>
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      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>168.3060</value>
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         <directOrIndirectOwnership>
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            <value>by 401(k)</value>
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 </nonDerivativeTable>
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   <derivativeTransaction>
      <securityTitle>
         <value>Non-qualified Stock Option</value>
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      <conversionOrExercisePrice>
         <value>18.2917</value>
      </conversionOrExercisePrice>
      <transactionDate>
         <value>2003-10-20</value>
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      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>M</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
         <transactionShares>
           <value>8000</value>
         </transactionShares>
         <transactionPricePerShare>
            <footnoteId id="F6"/>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>D</value>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
      <exerciseDate>
            <footnoteId id="F3"/>
      </exerciseDate>
      <expirationDate>
         <value>2006-03-29</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>8000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>0</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
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      </ownershipNature>
   </derivativeTransaction>
   <derivativeTransaction>
      <securityTitle>
         <value>Non-qualified Stock Option</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>22.125</value>
      </conversionOrExercisePrice>
      <transactionDate>
         <value>2003-10-20</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>M</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
         <transactionShares>
           <value>15000</value>
         </transactionShares>
         <transactionPricePerShare>
            <footnoteId id="F6"/>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>D</value>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
      <exerciseDate>
            <footnoteId id="F4"/>
      </exerciseDate>
      <expirationDate>
         <value>2007-06-01</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>15000</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>0</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeTransaction>
   <derivativeTransaction>
      <securityTitle>
         <value>Non-qualified Stock Option</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>35.083</value>
      </conversionOrExercisePrice>
      <transactionDate>
         <value>2003-10-20</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>M</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
      </transactionCoding>
      <transactionAmounts>
         <transactionShares>
           <value>19500</value>
         </transactionShares>
         <transactionPricePerShare>
            <footnoteId id="F6"/>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>D</value>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
      <exerciseDate>
            <footnoteId id="F5"/>
      </exerciseDate>
      <expirationDate>
         <value>2008-05-01</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>19500</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>0</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeTransaction>
 </derivativeTable>
   <footnotes>
      <footnote id="F1"> The Hartnack Family Trust</footnote>

      <footnote id="F2"> Shares held in the Union Bank of California 401(k) Plan as of 09/30/03.</footnote>

      <footnote id="F3"> Option vested in three equal annual installments on 03/29/97, 03/29/98, 03/29/99.</footnote>

      <footnote id="F4"> Option vested in three equal annual installments on 06/01/98, 06/01/99, 06/01/00.</footnote>

      <footnote id="F5"> Option vested in three equal annual installments on 05/01/99, 05/01/00, 05/01/01.</footnote>

      <footnote id="F6"> Not Applicable</footnote>
   </footnotes>
   <ownerSignature>
      <signatureName>Richard C. Hartnack</signatureName>
      <signatureDate>2003-10-21</signatureDate>
   </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----