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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1. Name and Address of Reporting Person * WASHKEWICZ DONALD E   2. Issuer Name and Ticker or Trading Symbol PARKER HANNIFIN CORP [PH] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman and CEO (Last) (First) (Middle) PARKER-HANNIFIN CORPORATION, 6035 PARKLAND BOULEVARD 3. Date of Earliest Transaction (Month/Day/Year) 04/24/2006 (Street) CLEVELAND, OH 44124-4141 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               23,724.976 I Parker Retirement Savings Plan Common Stock               989 (1) I Ann Washkewicz Revocable Trust Common Stock 04/24/2006   M   5,008 (2) A $ 28.083 87,150 D   Common Stock 04/24/2006   M   789 (3) A $ 41.8125 87,939 D   Common Stock 04/24/2006   M   32,339 (4) A $ 35.9375 120,278 D   Common Stock 04/24/2006   F   15,999 D $ 84.52 104,279 D   Common Stock 04/24/2006   G V 22,137 D $ 0 82,142 D   Common Stock 04/24/2006   G V 22,137 A $ 0 27,390 I Pamela Washkewicz Revocable Trust

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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

Option to Buy

$ 28.083

04/24/2006

M

7,500 (2)

01/30/1998

01/29/2007

Common Stock

7,500 (2)

$ 0 (5)

0

D

Option to Buy

$ 41.8125

04/24/2006

M

1,560 (3)

10/31/1998

10/30/2007

Common Stock

1,560 (3)

$ 0 (5)

0

D

Option to Buy

$ 35.9375

04/24/2006

M

56,260 (4)

(6)

08/08/2010

Common STock

56,260 (4)

$ 0 (5)

0

D

Option to Buy

$ 82.05

04/24/2006

A

771

04/24/2007

10/30/2007

Common Stock

771

$ 0 (7)

771

D

Option to Buy

$ 82.05

04/24/2006

A

23,921

04/24/2007

08/08/2010

Common Stock

23,921

$ 0 (7)

23,921

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
WASHKEWICZ DONALD E PARKER-HANNIFIN CORPORATION 6035 PARKLAND BOULEVARD CLEVELAND, OH 44124-4141	X		Chairman and CEO

Signatures

Thomas L. Meyer, Attorney-in-Fact		04/26/2006
**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)	Reflects Mr. Washkewicz's proportionate interest.
(2)	"Pyramid" stock option exercise resulting in net acquisition of 5,008 shares.
(3)	"Pyramid" stock option exercise resulting in net acquisition of 789 shares.
(4)	"Pyramid" stock option exercise resulting in net acquisition of 32,339 shares.
(5)	Granted under the Corporation's 1993 Stock Incentive Program in a transaction exempt under Rule 16b-3.
(6)	The option vested in two equal installments on 8/9/2001 and 8/9/2002.
(7)	Granted under the Corporation's 2003 Stock Incentive Plan in a transaction exempt under Rule 16b-3.

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