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 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 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:  May 9, 2007                      /s/Michael A. Winner
                                        --------------------------------------
                                        Michael A. Winner
                                        Executive Vice President and
                                          Chief Financial Officer