Safety Insurance (SAFT) 10-Q 2006 Q1 Quarterly report

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO SECTION 906 OF
THE SARBANES-OXLEY ACT OF 2002

In connection with this quarterly report of Safety Insurance Group, Inc. (the “Company”) on Form 10-Q for the period ending March 31, 2006 as filed with the United States Securities and Exchange Commission on the date hereof (the “Report”), I, William J. Begley, Jr., Vice President, Chief Financial Officer and Secretary of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

• The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

• The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of and for the periods presented in the Report.

Date: May 10, 2006

/s/ WILLIAM J. BEGLEY, JR.

William J. Begley, Jr.

Vice President, Chief Financial Officer and Secretary

(Principal Financial Officer)