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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,
 QCjn9bLX5mM7oWQSztiLxaAtuHYuFFuoDPSbSF0AwMmfhSsIj3FjzG0bT2Uek9i2
 CRoHqoxsdc25q+vvmI6Nqw==

<SEC-DOCUMENT>0001209191-03-026771.txt : 20031024
<SEC-HEADER>0001209191-03-026771.hdr.sgml : 20031024
<ACCEPTANCE-DATETIME>20031024160911
ACCESSION NUMBER:		0001209191-03-026771
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031022
FILED AS OF DATE:		20031024

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GREEN EMILY NAGLE
		CENTRAL INDEX KEY:			0001214768

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21433
		FILM NUMBER:		03956604

	BUSINESS ADDRESS:	
		STREET 1:		FORRESTER RESEARCH
		STREET 2:		400 TECHNOLOGY SQ
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		6176135782

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FORRESTER RESEARCH INC
		CENTRAL INDEX KEY:			0001023313
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ENGINEERING, ACCOUNTING, RESEARCH, MANAGEMENT [8700]
		IRS NUMBER:				042797789
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		400 TECHNOLOGY SQUARE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		6174977090

	MAIL ADDRESS:	
		STREET 1:		400 TECHNOLOGY SQUARE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>b48264eg.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-10-22</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001023313</issuerCik><issuerName>FORRESTER RESEARCH INC</issuerName>        <issuerTradingSymbol>FORR</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001214768</rptOwnerCik><rptOwnerName>GREEN EMILY NAGLE</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>C/O FORRESTER RESEARCH</rptOwnerStreet1><rptOwnerStreet2>400 TECHNOLOGY SQUARE</rptOwnerStreet2><rptOwnerCity>CAMBRIDGE</rptOwnerCity><rptOwnerState>MA</rptOwnerState><rptOwnerZipCode>02139</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Managing Director</officerTitle></reportingOwnerRelationsh
ip></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-10-22</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4500</value></transactionShares><transactionPricePerShare><value>11.69</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>16136</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-10-22</value></transactionDate><transacti
onCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4500</value></transactionShares><transactionPricePerShare><value>15.56</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>16136</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><derivativeTable><derivativeTransaction><securityTitle><value>Non-Qualified Stock Option (Right to Buy)</value></securityTitle><conversionOrExercisePrice><value>11.69</value></conversionOrExercisePrice><transactionDate><value>2003-10-22</value></transactionDate><deemedExecutionDate><value>2003-10-22</value></deemedExecutionDa
te><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>M</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>4500</value></transactionShares><transactionPricePerShare><value>11.69</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2000-07-09</value><footnoteId id="F1" /></exerciseDate><expirationDate><value>2009-07-08</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>4500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>4444</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTa
ble><footnotes><footnote id="F1">These options become exercisable in three equal installments on the first,  second, and third anniversaries of the grant date. </footnote></footnotes><ownerSignature><signatureName>/s/ Kimberly Maxwell for Emily Nagle Green (Attorney in Fact)</signatureName><signatureDate>2003-10-24</signatureDate></ownerSignature></ownershipDocument>

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</SEC-DOCUMENT>
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