Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SANTI ERNEST SCOTT
  2. Issuer Name and Ticker or Trading Symbol
ILLINOIS TOOL WORKS INC [ITW]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive V.P.
(Last)
(First)
(Middle)
ILLINOIS TOOL WORKS INC., 3600 WEST LAKE
3. Date of Earliest Transaction (Month/Day/Year)
03/16/2006
(Street)

GLENVIEW, IL 60026
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock (1) (2) (4) 03/16/2006   M   5,000 A $ 54.62 9,673 D  
Common Stock (1) (2) (4) 03/16/2006   S   5,000 D $ 97.41 4,673 D  
Common Stock (3) 08/08/1998   A   0 A $ 0 1,433 I See Footnote (3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (4) $ 54.62 03/16/2006   M     5,000 12/12/1998 12/12/2007 Common Stock 5,000 $ 54.62 0 D  
Employee Stock Option (4) $ 58.25 12/11/1998   A   5,000   12/11/1999 12/11/2008 Common Stock 5,000 $ 58.25 5,000 D  
Employee Stock Option (4) $ 65.5 12/17/1999   A   6,000   12/17/2000 12/17/2009 Common Stock 6,000 $ 65.5 6,000 D  
Employee Stock Option (4) $ 55.875 12/15/2000   A   15,000   12/15/2001 12/15/2010 Common Stock 15,000 $ 55.875 15,000 D  
Employee Stock Option (4) $ 62.25 12/14/2001   A   12,000   12/14/2002 12/14/2011 Common Stock 12,000 $ 62.25 12,000 D  
Employee Stock Option (4) $ 94.26 12/10/2004   A   30,000   12/10/2005 12/10/2014 Common Stock 30,000 $ 94.26 30,000 D  
Employee Stock Option (5) $ 84.16 02/01/2006   A   35,000   12/07/2006 02/01/2016 Common Stock 35,000 $ 84.16 35,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SANTI ERNEST SCOTT
ILLINOIS TOOL WORKS INC.
3600 WEST LAKE
GLENVIEW, IL 60026
      Executive V.P.  

Signatures

 Ernest Scott Santi by James H. Wooten, Jr., V.P., Gen. Counsel & Secretary Attorney-In-Fact POA on File   03/20/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Includes grant of restricted stock that vested over a 3 year period 12/16/2003, 12/16/2004, and 12/16/2005.
(2) Includes grant of restricted stock vesting over a 3 year period 12/16/2004, 12/16/2005, 12/18/2006.
(3) Shares allocated to my account in the Illinois Tool Works Inc. Savings & Investment Plan. Information reported as of December 31, 2005.
(4) Options vest in four equal annual installments beginning one year from date of grant.
(5) Options vest in four equal annual installments beginning in each December following the grant date.

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