<SUBMISSION>
<ACCESSION-NUMBER>0001209191-03-033922
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20031204
<FILING-DATE>20031208
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>PINNACLE WEST CAPITAL CORP
<CIK>0000764622
<ASSIGNED-SIC>4911
<IRS-NUMBER>860512431
<STATE-OF-INCORPORATION>AZ
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>400 NORTH FIFTH STREET
<STREET2>.
<CITY>PHOENIX
<STATE>AZ
<ZIP>85004
<PHONE>6023792500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>400 NORTH FIFTH STREET
<STREET2>.
<CITY>PHOENIX
<STATE>AZ
<ZIP>85004
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>AZP GROUP INC
<DATE-CHANGED>19870506
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>POST WILLIAM J
<CIK>0001027958
<ASSIGNED-SIC>4911
<STATE-OF-INCORPORATION>AZ
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-08962
<FILM-NUMBER>031041854
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>400 NORTH FIFTH STREET
<CITY>PHOENIX
<STATE>AZ
<ZIP>85004
<PHONE>6023792500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>400 NORTH FIFTH STREET
<STREET2>.
<CITY>PHOENIX
<STATE>AZ
<ZIP>85004
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bpx68497_bpx12wjp4.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-12-04</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000764622</issuerCik><issuerName>PINNACLE WEST CAPITAL CORP</issuerName>        <issuerTradingSymbol>PNW</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001027958</rptOwnerCik><rptOwnerName>POST WILLIAM J</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>400 N. 5TH ST.</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>PHOENIX</rptOwnerCity><rptOwnerState>AZ</rptOwnerState><rptOwnerZipCode>85004</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Chairman &amp; CEO</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-12-04</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>5775</value></transactionShares><transactionPricePerShare><value>19.00</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>112675</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-12-04</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>11225</value><footnoteId id="F1" /></transactionShares><transactionPricePerShare><value>39.03</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>101450</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><derivativeTable><derivativeTransaction><securityTitle><value>Employee Stock Option (Right to Buy)</value></securityTitle><conversionOrExercisePrice><value>19.00</value></conversionOrExercisePrice><transactionDate><value>2003-12-04</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>17000</value></transactionShares><transactionPricePerShare><value>19.00</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F2" /></exerciseDate><expirationDate><value>2004-11-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>17000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">The minimum amount of shares were sold solely for the purpose of meeting tax withholding requirements and to satisfy option exercise and broker commission.  Mr. Post retained all other shares received upon the noted option exercise.</footnote><footnote id="F2">The option became exercisable 1/3 of the grant per year commencing 11-16-95.</footnote></footnotes><ownerSignature><signatureName>William J. Post</signatureName><signatureDate>2003-12-08</signatureDate></ownerSignature></ownershipDocument>

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</TEXT>
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</SUBMISSION>
