EXHIBIT 5.1 OLSHAN GRUNDMAN FROME ROSENZWEIG & WOLOSKY LLP PARK AVENUE TOWER, 65 EAST 55TH STREET NEW YORK, NEW YORK 10022 (212) 451-2300 FACSIMILE (212) 451-2222 www.ogfrwlaw.com NEW JERSEY OFFICE 2001 ROUTE 46, SUITE 202 PARSIPPANY, NEW JERSEY 07054 (973) 335-7400 FACSIMILE (973) 335-8018 December 9, 2004 Securities and Exchange Commission 450 Fifth Street, N.W. Judiciary Plaza Washington, D.C. 20549 Re: The Quigley Corporation, Inc. Registration Statement on Form S-3 (Registration No. 333-119748) ----------------------------- Ladies and Gentlemen: Reference is made to the Registration Statement on Form S-3 filed on October 14, 2004 (Registration No. 333-119748) (the "Registration Statement"), filed with the Securities and Exchange Commission by The Quigley Corporation, Inc., a Nevada corporation (the "Company"). The Registration Statement relates to the resale by certain selling stockholders of an aggregate of 113,097 shares (the "Shares") of the Company's common stock, $.0005 par value per share. We advise you that we have examined original or copies certified or otherwise identified to our satisfaction of the Certificate of Incorporation and By-laws of the Company, minutes of meetings of the Board of Directors and stockholders of the Company, the Registration Statement, and such other documents, instruments and certificates of officers and representatives of the Company and public officials, and we have made such examination of the law as we have deemed appropriate as the basis for the opinion hereinafter expressed. In making such examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, and the conformity to original documents of documents submitted to us as certified or photostatic copies. Based upon the foregoing, we are of the opinion that the Shares are duly authorized, legally issued, fully paid and non-assessable.December 9, 2004 Page 2 We hereby consent to the filing of this opinion as an exhibit to the Registration Statement and we further consent to the reference to this firm under the caption "Legal Matters" in the Registration Statement and the Prospectus forming a part thereof. Very truly yours, /s/ OLSHAN GRUNDMAN FROME ROSENZWEIG & WOLOSKY LLP ------------------------------------------------------ OLSHAN GRUNDMAN FROME ROSENZWEIG & WOLOSKY LLP