EXHIBIT 5.1

Lang  Michener

BARRISTERS & SOLICITORS PATENT & TRADE MARK AGENTS

Toronto
Vancouver
Ottawa

BCE Place, P.O. Box 747, Suite 2500
181 Bay Street, Toronto, Ontario, Canada M5J 2T7
Telephone  (416) 360-8600
Facsimile  (416) 365-1719


May 8, 2002

Diversinet  Corp.
2225 Sheppard Avenue East, 17th Floor
Toronto,  Ontario
M2J  5C2


Dear  Sirs:

RE:  DIVERSINET CORP.  (THE "COMPANY")

We  have acted as special Canadian counsel to the Company in connection with the
issue and sale by the Company on April 4, 2002 of 5,186,708 units (the "Units"),
with  each Unit consisting of one common share in the capital of the Company and
three-quarters of a share purchase warrant pursuant to stock purchase agreements
(the  "Purchase  Agreements")  dated  March  27, 2002 among the Company and each
of  the  parties  thereto. The common shares and share purchase warrants forming
part  of  the Units are referred to herein as the Common Shares and Warrants
respectively.

We  consent  to  the  filing  of  our  opinion as an exhibit to the registration
statement  (the  Registration Statement) of the Company on Form F-3 dated May 8,
2002  to  be  filed  with the Securities and Exchange Commission pursuant to the
United  States  Securities  Act  of  1933.

In connection with rendering this opinion,

(a)  we  have  reviewed  the  following  documents: (i) the form of the Purchase
     Agreements  and execution pages thereto; and (ii) certificates representing
     the  Common  Shares  and  Warrants;

(b)  we  have examined originals, photocopies, certified copies of facsimiles of
     such  public records and certificates and have considered such questions of
     law as we have deemed relevant and necessary in order to render the opinion
     hereinafter  expressed;

(c)  we  have  assumed the genuineness of all signatures and the authenticity of
     all documents submitted to us as photostatic, certified or facsimile copies
     and  the  authenticity  of  the  originals  of all photostatic or facsimile
     copies;

(d)  we  have assumed original copies of the executed Purchase Agreements are in
     the  form  provided  to  us  by  the  Company;



Lang  Michener

BARRISTERS & SOLICITORS PATENT & TRADE MARK AGENTS


(e)  for  the purposes of our opinion in paragraph 1, we have relied exclusively
     upon  a  certificate  of  status issued under the Business Corporations Act
     (Ontario)  dated  as  of  the  dated  May  7,  2002;

(f)  as  to certain matters of fact, we have relied solely on a certificate from
     the  President  and  Chief  Executive Officer of the Company dated April 4,
     2002 and have assumed that a current dated certificate would be provided if
     requested.

Although  we  are  qualified  to  practice  law  in the Provinces of Ontario and
British  Columbia,  our  opinions are limited to the laws and of the Province of
Ontario  and  the  federal  laws  of  Canada  applicable  therein.

Based  and  relying  upon and subject to the foregoing and to the qualifications
herein  expressed,  we  are  of  the  opinion  that:

1.   The Company is a corporation incorporated under the laws of Ontario, Canada
     and  has  not  been  dissolved.

2.   The  issuance  and delivery of the Common Shares and Warrants in accordance
     with  the  terms  of  the  Purchase  Agreements  has  been duly authorized.

3.   The  issuance  and  delivery  of  the Common Shares initially issuable upon
     exercise  of  the  Warrants  (the "Warrant Shares"), in accordance with the
     terms  of  the  Warrants,  has  been  duly  authorized.

4.   The  Common  Shares  were  duly  and  validly  issued,  fully  paid  and
     nonassessable.

5.   The  Warrant  Shares,  when  issued  in  accordance  with  the terms of the
     Warrants,  will  be duly and validly issued, fully paid and non-assessable.

The  foregoing  opinion is provided solely for the benefit of the Company. It is
not  to  be  transmitted  to any other person nor is it to be relied upon by any
other  person  or  for  any  other  purpose or quoted from or referred to in any
document  or  filed  with  any government agency, other than its inclusion as an
exhibit  to  the  Registration  Statement,  without  our  prior written consent.

Yours  very  truly,


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