EXHIBIT 5.1

November 14, 2000

Board of Directors
American Technologies Group, Inc.
1017 S. Mountain Ave.
Monrovia, California 91016

Gentlemen:

     As General Counsel for American Technologies Group, Inc. (the “Company”), in connection with the Registration Statement on Form SB-2 (the “Registration Statement”) to be filed with the Securities and Exchange Commission on or about November 14, 2000 intended to register 35,077,698 shares of the common stock of the Company as described therein (the “Shares”), I have examined such corporate records and other documents and such questions of law as I have considered necessary or appropriate for the purposes of this opinion and, on the basis of such examination, advise you that in my opinion the Shares will be, when issued as specified in the Registration Statement, validly issued, fully paid and nonassessable.

     I hereby consent to the filing of this opinion as an Exhibit to the Registration Statement. This consent is not to be construed as an admission that I am a person whose consent is required to be filed with the Registration Statement under the provisions of the Securities Act of 1933, as amended.