Exhibit 99.1

			   CERTIFICATION PURSUANT TO
		 TITLE 18, UNITED STATES CODE, SECTION 1350,
			    AS ADOPTED PURSUANT TO
		SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


	In connection with the Quarterly Report of Ohio Casualty Corporation
on Form 10-Q for the quarterly period ended March 31, 2003 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Dan
R. Carmichael, Chief Executive Officer of the Company, certify, pursuant to
Title18, United States Code, Section 1350, as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002, that:

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

		(2)     The information contained in the Report fairly
presents, in all material respects, the financial condition and result of
operations of the Company.




					     /s/ Dan R. Carmichael
					     ------------------------------
					     Dan R. Carmichael
					     President and Chief Executive
					     Officer
					     May 13, 2003