Exhibit 31.2

                               CERTIFICATION



I, Michael A. Winner, certify that:

      1. I have reviewed this quarterly report on Form 10-Q of Ohio Casualty
         Corporation;

      2. Based on my knowledge, this report does not contain any untrue
         statement of a material fact or omit to state a material fact
         necessary to make the statements made, in light of the circumstances
         under which such statements were made, not misleading with respect
         to the period covered by this report;

      3. Based on my knowledge, the financial statements, and other
         financial information included in this report, fairly present in
         all material respects the financial condition, results of
         operations and cash flows of the registrant as of, and for, the
         periods presented in this report;

      4. The registrant's other certifying officer(s) and I are responsible
         for establishing and maintaining disclosure controls and procedures
         (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and
         internal control over financial reporting (as defined in exchange
         Act Rules 13a-15(f) and 15d-15(f)) for the Registrant and we have:

          (a) Designed such disclosure controls and procedures, or caused such
              disclosure controls and procedures to be designed under our
              supervision, to ensure that material information relating to the
              registrant, including its consolidated subsidiaries, is made
              known to us by others within those entities, particularly during
              the period in which this report is being prepared;

          (b) Designed such internal control over financial reporting, or
              caused such internal control over financial reporting to be
              designed under our supervision, to provide reasonable assurance
              regarding the reliability of financial reporting and the
              preparation of financial statements for external purposes in
              accordance with generally accepted accounting principles;

          (c) Evaluated the effectiveness of the registrant's disclosure
              controls and procedures and presented in this quarterly report
              our conclusions about the effectiveness of the disclosure
              controls and procedures, as of the end of the period covered
              by this report based on such evaluation; and

          (d) Disclosed in this report any change in the registrant's
              internal control over financial reporting that occurred
              during the registrant's most recent fiscal quarter (the
              registrant's fourth fiscal quarter in the case of an annual
              report) that has materially affected, or is reasonably
              likely to materially affect, the registrant's internal
              control over financial reporting; and

      5. The registrant's other certifying officer(s) and I have
         disclosed, based on our most recent evaluation, of internal control
         over financial reporting, to the registrant's auditors and the audit
         committee of the registrant's board of directors (or persons
         performing the equivalent functions):

          (a) All significant deficiencies and material weaknesses in the
              design or operation of internal control over financial
              reporting which are reasonably likely to adversely affect the
              registrant's ability to record, process, summarize and report
              financial information; and

          (b) Any fraud, whether or not material, that involves management or
              other employees who have a significant role in the
              registrant's internal control over financial reporting.




Date:  April 26, 2006                     /s/Michael A. Winner
                                          -------------------------------------
                                          Michael A. Winner
                                          Executive Vice President and
                                          Chief Financial Officer