-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Ig8h6F3J3mygjDJYb6ABM5N0Pv36isXRBT27FkAGv/NdAhwiZrtTLZ5QL8L07VE1
 5VFZw3bDVC2ot5wctEHf3w==

<SEC-DOCUMENT>0001179110-05-016669.txt : 20050818
<SEC-HEADER>0001179110-05-016669.hdr.sgml : 20050818
<ACCEPTANCE-DATETIME>20050818194542
ACCESSION NUMBER:		0001179110-05-016669
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050816
FILED AS OF DATE:		20050818
DATE AS OF CHANGE:		20050818

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			JAMDAT MOBILE INC
		CENTRAL INDEX KEY:			0001135271
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		IRS NUMBER:				954991817

	BUSINESS ADDRESS:	
		STREET 1:		3415 S. SEPULVEDA BLVD.
		STREET 2:		SUITE 700
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90034
		BUSINESS PHONE:		310-636-3100

	MAIL ADDRESS:	
		STREET 1:		3415 S. SEPULVEDA BLVD.
		STREET 2:		SUITE 700
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90034

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GURLEY J WILLIAM
		CENTRAL INDEX KEY:			0001190191

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50928
		FILM NUMBER:		051036874

	BUSINESS ADDRESS:	
		STREET 1:		2480 SAND HILL ROAD,
		STREET 2:		SUITE 200
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
		BUSINESS PHONE:		6508548180

	MAIL ADDRESS:	
		STREET 1:		2480 SAND HILL ROAD
		STREET 2:		SUITE 200
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-08-16</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001135271</issuerCik>
        <issuerName>JAMDAT MOBILE INC</issuerName>
        <issuerTradingSymbol>JMDT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001190191</rptOwnerCik>
            <rptOwnerName>GURLEY J WILLIAM</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>BENCHMARK CAPITAL PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>2480 SAND HILL ROAD</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>20.12</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-08-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6667</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-08-16</value>
            </exerciseDate>
            <expirationDate>
                <value>2012-08-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>6667</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6667</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Craig Gatarz, by power of attorney</signatureName>
        <signatureDate>2005-08-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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