EXHIBIT 5.1. Legal opinion of the Business Law Group

E-Rex, Inc.
8890 Coral Way, Suite 220
Miami, FL  33165

Dear Members of the Board of Directors:

You have asked us to provide you our legal opinion with regard to the legality
of certain securities of E-Rex, Inc., (the "Company"), covered by a Form SB-2
Registration Statement (the "Registration Statement") to be filed with the
Securities and Exchange Commission by the Company in electronic form on or about
December 29, 2000, for the purpose of registering such securities under the
Securities Act of 1933.

In connection with this opinion, we have examined the corporate records of the
Company, including the Certificate of Incorporation and Amendments thereto, the
By-laws, and the Minutes of the Board of Directors and Shareholders meetings,
the Registration Statement and such other documents and records as we have
deemed relevant in order to render this opinion. In addition, the opinion
expressed herein is limited to federal law and the laws of the State of Nevada
and the State of Florida. In forming this opinion, we have relied upon the
documents submitted to us by the Company and the representations made to us by
its officers and directors.

         Based upon the foregoing our opinion is as follows:

The Company is duly and validly organized and is validly existing and in good
standing under the laws of the State of Nevada and the State of Florida.

The Registered Securities, when sold and issued in accordance with the
Registration Statement and the final prospectus thereunder, and for the
consideration therein referred to, will be legally issued, fully paid and
non-assessable.

We hereby consent to the filing of this opinion with the Securities and Exchange
Commission as an exhibit to the Registration Statement and further consent to
statements made therein regarding our office and the use of our name under the
heading of "Legal Matters" in the prospectus constituting a part of such
Registration Statement.

Very truly yours,

/S/ THE BUSINESS LAW GROUP

December 29, 2000