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**EXHIBIT 12.1**

**SECTION 302 CERTIFICATION**

I, Ronald W. Thiessen, Chief Executive Officer of Rockwell
Ventures Inc., certify that:

|1. | I have reviewed this Annual
        Report on Form 20-F of Rockwell Ventures Inc. (the Company);                                                                                                                                                                                                                                        
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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 Company as of, and for, the periods presented in
        this report;                      
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|4. | The Company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 Company and have:                                                                                            
|   |                                                                                                                                                                                                                                                                                                                                           
|   | (a)                                                                                                                                                                                                                                                                                                                                       
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|   | (b)                                                                                                                                                                                                                                                                                                                                       
|   |                                                                                                                                                                                                                                                                                                                                           
|   | (c)                                                                                                                                                                                                                                                                                                                                       
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|5. | The Companys other certifying
        officer(s) and I have disclosed, based on our most recent evaluation of
        the internal control over financial reporting, to the Companys auditors
        and the audit committee of Companys board of directors (or persons
        performing the equivalent functions):                 
|   |                                                                                                                                                                                                                                                                                                                                           
|   | (a)                                                                                                                                                                                                                                                                                                                                       
|   |                                                                                                                                                                                                                                                                                                                                           
|   | (b)                                                                                                                                                                                                                                                                                                                                       

|Date:  | September 15, 2005           | 
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|       |                              | 
|       |                              | 
|       | /s/
      Ronald W. Thiessen | 
|By:    | Ronald W. Thiessen           | 
|Title: | Chief Executive Officer      | 

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