<SUBMISSION>
<ACCESSION-NUMBER>0000354647-05-000061
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20050722
<FILING-DATE>20050722
<DATE-OF-FILING-DATE-CHANGE>20050722
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>CVB FINANCIAL CORP
<CIK>0000354647
<ASSIGNED-SIC>6022
<IRS-NUMBER>953629339
<STATE-OF-INCORPORATION>CA
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>701 N HAVEN AVE STE 350
<CITY>ONTARIO
<STATE>CA
<ZIP>91764
<PHONE>9099804030
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>701 N HAVEN AVENUE
<CITY>ONTARIO
<STATE>CA
<ZIP>91764
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>LOPORTO JOHN J
<CIK>0001208156
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-10140
<FILM-NUMBER>05968284
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>701 NORTH HAVEN AVENUE
<STREET2>SUITE 350
<CITY>ONTARIO
<STATE>CA
<ZIP>91764
<PHONE>9099804030
</BUSINESS-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>loporto072205_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-07-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000354647</issuerCik>
        <issuerName>CVB FINANCIAL CORP</issuerName>
        <issuerTradingSymbol>CVBF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001208156</rptOwnerCik>
            <rptOwnerName>LOPORTO JOHN J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>701 NORTH HAVEN AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 350</rptOwnerStreet2>
            <rptOwnerCity>ONTARIO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>91764</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-07-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1168665</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By two trusts</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>John J. Lo Porto</signatureName>
        <signatureDate>2005-07-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
