Table of Contents

Exhibit12.1

CERTIFICATIONS

I, Harry N. Vafias, certifythat:

1.    I have reviewed this annual report on Form20-F of StealthGas Inc.;

2.    Based on my knowledge,this annual report does not contain any untrue statement of a materialfact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements weremade, not misleading with respect to the period covered by this annualreport;

3.    Based on my knowledge, the financialstatements, and other financial information included in this annualreport, fairly present in all material respects the financialcondition, results of operations and cash flows of StealthGas Inc. asof, and for, the periods presented in this annual report;

4.    StealthGas Inc.’s other certifying officerand I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the company and have:

(a)    designed suchdisclosure controls and procedures, or caused such disclosure controlsand procedures to be designed under our supervision, to ensure thatmaterial information relating to StealthGas Inc., including itsconsolidated subsidiaries, is made known to us by others within thoseentities, particularly during the period in which this annual report isbeing prepared;

(b)    [Omitted];

(c)    evaluated the effectiveness of StealthGas Inc.’sdisclosure controls and procedures and presented in this report ourconclusions about the effectiveness of the disclosure controls andprocedures, as of the end of the period covered by this report based onsuch evaluation; and presented in this annual report our conclusionsabout the effectiveness of the disclosure controls and procedures basedon our evaluation as of the Evaluation Date;

(d)    disclosedin this report any change in StealthGas Inc.’s internal controlover financial reporting that occurred during the period covered by theannual report that has materially affected, or is reasonably likely tomaterially affect, the company’s internal control over financialreporting; and

5.    StealthGas Inc.’s othercertifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting which arereasonably likely to adversely affect the company’s ability torecord, process, summarize and report financial information; and

(a)    all significant deficiencies and material weaknesses inthe design or operation of internal control over financial reportingwhich are reasonably likely to adversely affect StealthGasInc.’s ability to record, process, summarize and reportfinancial information; and

(b)    any fraud, whether or notmaterial, that involves management or other employees who have asignificant role in StealthGas Inc.’s internal control overfinancial reporting.

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| Date: April 19, 2006                                |
| /s/ Harry N.Vafias                                  |
| Harry N. VafiasPresident and ChiefExecutive Officer |
|                                                     |

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