**Exhibit      31.1**

**Certification      of Principal Executive Officer**

**Pursuant      to Rule 13a-14(a) of**

**Securities      Exchange Act of 1934**

| **1.** | I                have reviewed this quarterly report on Form 10-QSB of Hemagen Diagnostics,                Inc; |
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| **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; |
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| **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                small                business issuer as of, and for, the periods presented in this                report; |
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| **4.** | The                small business issuer’s other certifying officer 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 small                business issuer and we have: |
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|   | **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 small business issuer, 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; |
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|   | **b.** | Evaluated                the effectiveness of the small business issuer’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 |
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|   | **c.** | Disclosed                in this report any                change in the small business issuer’s internal control over financial                reporting that occurred during the small business issuer’s most recent                fiscal quarter that has materially affected, or is reasonably likely                to                materially affect, the small business issuer’s internal control over                financial reporting; and |
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| **5.** | The                small business issuer’s other certifying officer and I have disclosed,                based on our most recent evaluation of internal control over financial                reporting, to the small business issuer’s auditors and the audit committee                of the small business issuer’s board of directors (or persons performing                the equivalent functions): |
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|   | **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 small business issuer’s ability                to record, process, summarize and report financial information;                and |
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|   | **b.**  | Any              fraud, whether or not material, that involves management or other              employees who have a significant role in the small business issuer’s              internal control over financial              reporting. |
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