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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Ps8DhacBRd1et00p15AaeT5aSc8QqAZ/lRp0PW4fhx9WuAadafsEzDk1QWzaNXNz
 MhyKN8HKvIklVrXNgrMwOQ==

<SEC-DOCUMENT>0001209191-04-000784.txt : 20040105
<SEC-HEADER>0001209191-04-000784.hdr.sgml : 20040105
<ACCEPTANCE-DATETIME>20040105165027
ACCESSION NUMBER:		0001209191-04-000784
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040102
FILED AS OF DATE:		20040105

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FLOOD DAVID T
		CENTRAL INDEX KEY:			0001180969

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-04797
		FILM NUMBER:		04505769

	BUSINESS ADDRESS:	
		STREET 1:		ILLINOIS TOOL WORKS INC
		STREET 2:		3600 WEST LAKE AVE
		CITY:			GLENVIEW
		STATE:			IL
		ZIP:			60068
		BUSINESS PHONE:		8476574077

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ILLINOIS TOOL WORKS INC
		CENTRAL INDEX KEY:			0000049826
		STANDARD INDUSTRIAL CLASSIFICATION:	GENERAL INDUSTRIAL MACHINERY & EQUIPMENT [3560]
		IRS NUMBER:				361258310
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3600 W LAKE AVE
		CITY:			GLENVIEW
		STATE:			IL
		ZIP:			60025-5811
		BUSINESS PHONE:		8476574106

	MAIL ADDRESS:	
		STREET 1:		3600 WEST LAKE AVENUE
		CITY:			GLENVIEW
		STATE:			IL
		ZIP:			60025-5811
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c81840-01dtf.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2004-01-02</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000049826</issuerCik><issuerName>ILLINOIS TOOL WORKS INC</issuerName>        <issuerTradingSymbol>ITW</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001180969</rptOwnerCik><rptOwnerName>FLOOD DAVID T</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1></rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity></rptOwnerCity><rptOwnerState></rptOwnerState><rptOwnerZipCode></rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Executive Vice President</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTr
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Date><value>2008-12-11</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>10000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>10000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Employee Stock Option</value><footnoteId id="F3" /></securityTitle><conversionOrExercisePrice><value>65.50</value></conversionOrExercisePrice><transactionDate><value>1999-12-17</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>12000</value></transactionShares><transactionPricePerShare><valu
e>65.50</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2000-12-17</value></exerciseDate><expirationDate><value>2009-12-17</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Comon Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>12000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>12000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Employee Stock Option</value><footnoteId id="F3" /></securityTitle><conversionOrExercisePrice><value>55.875</value></conversionOrExercisePrice><transactionDate><value>2000-12-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormTy
pe><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>37000</value></transactionShares><transactionPricePerShare><value>55.875</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2001-12-15</value></exerciseDate><expirationDate><value>2010-12-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>37000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>37000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Employee Stock Option</value><footnoteId id="F3" /
></securityTitle><conversionOrExercisePrice><value>62.25</value></conversionOrExercisePrice><transactionDate><value>2001-12-14</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>40000</value></transactionShares><transactionPricePerShare><value>62.25</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2002-12-14</value></exerciseDate><expirationDate><value>2011-12-14</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>40000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>40000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNatu
re><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Includes grant of restricted stock vesting over 3 year period:  12/16/03, 12/16/04, 12/16/05</footnote><footnote id="F2">Grant of 9,000 shares of Restricted Stock January 2, 2004 vesting over 3 year period:  12/16/2004, 12/16/2005, 12/18/2006.</footnote><footnote id="F3">Options vest in four equal annual installments beginning one year from date of grant.</footnote></footnotes><ownerSignature><signatureName> David T. Flood by S. S. Hudnut, Sr. V.P., Gen. Counsel &amp; Secretary   Attorney-In-Fact   P.O.A. on File</signatureName><signatureDate>2004-01-05</signatureDate></ownerSignature></ownershipDocument>

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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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