EXHIBIT 12.1

**RULE 13a-14(a) CEO CERTIFICATION**

I, John Kearney, certify that:

 

1.           I have reviewed this Annual Reporton Form 20-F of Canadian Zinc Corporation (the “**Company**”);

 

2.           Based on my knowledge, this reportdoes 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 thisreport;

 

3.           Based on my knowledge, the financialstatements, 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;

 

4.           The Company’s other certifyingofficer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange ActRules 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 company and have:

 

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

 

(b)           Designed suchinternal 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 forexternal purposes in accordance with generally accepted accounting principles;

 

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

 

(d)           Disclosed inthis report any change in the Company’s internal control over financial reporting that occurred during the period coveredby the Annual Report that has materially affected, or is reasonably likely to materially affect, the Company’s internal controlover financial reporting; and

 

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

 

(a)           All significantdeficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonablylikely to adversely affect the Company’s ability to record, process, summarize and report financial information; and

 

(b)           Any fraud, whetheror not material, that involves management or other employees who have a significant role in the Company’s internal controlover financial reporting.