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 *
CRIMMINS DANIEL F
   2. Issuer Name and Ticker or Trading Symbol
SAFETY INSURANCE GROUP INC [SAFT] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP - Marketing
(Last)
(First)
(Middle)
20 CUSTOM HOUSE STREET		 3. Date of Earliest Transaction (Month/Day/Year)
04/11/2005
(Street)

BOSTON, MA 02110		 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 04/11/2005 04/11/2005 M   5,904 A $ 12 124,263 D  
Common Stock 04/11/2005 04/11/2005 S   5,904 D $ 31.6389 118,359 D  
Common Stock 04/11/2005 04/11/2005 M   1,615 A $ 13.03 119,974 D  
Common Stock 04/11/2005 04/11/2005 S   1,615 D $ 31.6389 118,359 D  
Common Stock 04/12/2005 04/12/2005 M   10,943 A $ 13.03 129,302 D  
Common Stock 04/12/2005 04/12/2005 S   10,943 D $ 31.4092 118,359 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
Non-Qualified Stock Options (right to buy) $ 12 04/11/2005(1) 04/11/2005(1) M     5,904 11/27/2003(2) 11/27/2012 Common Stock 5,904 $ 0 17,712 D  
Non-Qualified Stock Options (right to buy) $ 13.03 04/11/2005(1) 04/11/2005(1) M     1,615 03/31/2004(3) 03/31/2013 Common Stock 1,615 $ 0 27,687 D  
Non-Qualified Stock Options (right to buy) $ 13.03 04/12/2005(1) 04/12/2005(1) M     10,943 03/31/2004(3) 03/31/2013 Common Stock 10,943 $ 0 16,744 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
CRIMMINS DANIEL F
20 CUSTOM HOUSE STREET
BOSTON, MA 02110		       VP - Marketing  

Signatures

 Daniel F. Crimmins   04/13/2005
**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) The sales reported on this form were made pursuant to a written trading plan adopted in accordance with Rule 10b5-1 on 3/24/05.
(2) Mr. Crimmins was granted options to purchase 29,520 shares of common stock on November 27, 2002. These options vest in five equal 20% annual installments beginning November 27, 2003. Options from this grant have been previously exercised by Mr. Crimmins with respect to 5,904 shares.
(3) Mr. Crimmins was granted options to purchase 41,860 shares of common stock on March 31, 2003. These options vest in three annual installments of 30% on March 31, 2004, 30% on March 31, 2005 and the remaining 40% on March 31, 2006. Options have been previously exercised and reported by Mr. Crimmins with respect to 12,558 shares.

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