CERTIFICATION

I, Thomas E. Oland, certify that:

1.   I have reviewed this quarterly report on Form 10-Q of Techne 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 officers 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)
     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)   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

     c)   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 that has materially
          affected, or is reasonable likely to materially affect, the
          registrant's internal control over financial reporting; and


5.   The registrant's other certifying officers 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 function):

     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, 2005

 /s/ Thomas E. Oland
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Thomas E. Oland
Chief Executive Officer