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 *
KONIDARIS NICHOLAS
   2. Issuer Name and Ticker or Trading Symbol
ELECTRO SCIENTIFIC INDUSTRIES INC [ESIO] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President and CEO
(Last)
(First)
(Middle)
13900 NW SCIENCE PARK DR.		 3. Date of Earliest Transaction (Month/Day/Year)
04/01/2005
(Street)

PORTLAND, OR 97229		 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 04/01/2005 04/01/2005 F   3,504 (1) D $ 19.39 17,918 D  

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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
Incentive Stock Option (right to buy) $ 25.5               (2) 07/12/2014 Common Stock 15,684   15,684 D  
Non-Qualified Stock Option (right to buy) $ 25.5               (2) 07/12/2014 Common Stock 24,316   24,316 D  
Non-Qualified Stock Option (right to buy) $ 25.71               (3) 01/06/2014 Common Stock 420,000   420,000 D  
Performance Restricted Stock Units Grant $ 0             07/12/2007(4) 07/12/2007 Common Stock 20,000   20,000 D  
Time-Based Restricted Stock Units Grant $ 0             07/22/2009(5) 07/22/2009 Common Stock 20,000   20,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
KONIDARIS NICHOLAS
13900 NW SCIENCE PARK DR.
PORTLAND, OR 97229		   X     President and CEO  

Signatures

 Nicholas Konidaris   04/04/2005
**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) Payment of tax liability by delivering 3504 shares incident to the vesting of restricted stock in accordance with Rule 16b-3.
(2) The ISO and NQ granted on this date vest together for 25% of the total shares on the first four anniversaries of the grant date. Effective January 25, 2005 the vesting of the option was accelerated to be 100% vested on January 25, 2005, however exercisability is restricted to the original vesting schedule.
(3) Options become exercisable for 25% of the shares on the first four anniversaries of the grant date. Effective January 25, 2005 the vesting of the option was accelerated to be 100% vested on August 26, 2005, however exercisability is restricted to the original vesting schedule.
(4) Performance-Based Restricted Stock Units cliff vest after three years following grant date if certain levels of performance are achieved vs. a peer group of companies.
(5) Time-Based Restricted Stock Units cliff vest on July 22, 2009.

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