<SUBMISSION>
<ACCESSION-NUMBER>0001004980-07-000166
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20070711
<FILING-DATE>20070713
<DATE-OF-FILING-DATE-CHANGE>20070713
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>PG&E CORP
<CIK>0001004980
<ASSIGNED-SIC>4931
<IRS-NUMBER>943234914
<STATE-OF-INCORPORATION>CA
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>ONE MARKET SPEAR TOWER
<STREET2>SUITE 2400
<CITY>SAN FRANCISCO
<STATE>CA
<ZIP>94105
<PHONE>4152677000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>ONE MARKET SPEAR TOWER
<STREET2>SUITE 2400
<CITY>SAN FRANCISCO
<STATE>CA
<ZIP>94105
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>PG&E PARENT CO INC
<DATE-CHANGED>19951214
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>King Thomas B
<CIK>0001188481
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-12609
<FILM-NUMBER>07978756
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>(415) 973-7431
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>PACIFIC GAS AND ELECTRIC COMPANY
<STREET2>P O BOX 770000
<CITY>SAN FRANCISCO
<STATE>CA
<ZIP>94177
</MAIL-ADDRESS>
<FORMER-NAME>
<FORMER-CONFORMED-NAME>KING THOMAS B
<DATE-CHANGED>20020911
</FORMER-NAME>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-07-11</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001004980</issuerCik>
        <issuerName>PG&amp;E CORP</issuerName>
        <issuerTradingSymbol>PCG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001188481</rptOwnerCik>
            <rptOwnerName>King Thomas B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE MARKET, SPEAR TOWER</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2400</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO,</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94105</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-07-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>38527</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>17898.34</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3817.12</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Trustee of PG&amp;E Corporation Retirement Savings Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Forfeiture of restricted stock upon reporting person's resignation from PG&amp;E Corporation effective July 11, 2007.</footnote>
        <footnote id="F2">Includes 10,198.33 Special Incentive Stock Ownership Premiums (SISOPs) (phantom stock) awarded pursuant to the PG&amp;E Corporation Executive Stock Ownership Program and reflects the acquisition of 71.86 SISOPs on January 16, 2007, and 73.17 SISOPs on April 16, 2007 pursuant to a dividend award feature of the PG&amp;E Corporation Executive Stock Ownership Program.  SISOPs vest three years after the date of grant subject to accelerated vesting upon certain events.  Unvested SISOPs are subject to forfeiture if certain stock ownership targets are not met.  Vested SISOPs are automatically payable in an equal number of shares following termination of employment.</footnote>
        <footnote id="F3">Represents the approximate number of shares of PG&amp;E Corporation common stock held for the reporting person in the PG&amp;E Corporation Retirement Savings Plan (RSP).  That fund holds units consisting of PG&amp;E Corporation common stock and a small short-term investments component.  The number of shares is computed by dividing the value of the units by the daily closing price.  Dividends are automatically invested in additional units at the election of the participant.  These holdings have been trued up to conform to the RSP balance at July 11, 2007 and reflect the acquisition of approximately 24.42 shares on January 16, 2007, and 26.34 shares on April 16, 2007 due to dividend reinvestment.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Eric Montizambert, Attorney-in-Fact for Thomas B. King (signed Power of Attorney on file with SEC)</signatureName>
        <signatureDate>2007-07-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
