REGISTRATION RIGHTS AGREEMENT


     THIS REGISTRATION RIGHTS AGREEMENT (this "Agreement") is made by and
between HOUSTON AMERICAN ENERGY CORP., a Delaware corporation (the "Company"),
and the undersigned (the "Investor") effective as of the date this Agreement is
accepted by the Company.

     This Agreement is being entered into pursuant to the Purchase Agreement,
dated as of the date hereof between the Company and the Investor (the "Purchase
Agreement").

     The Company and the Investor hereby agree as follows:

     1.     Definitions. Capitalized terms used and not otherwise defined herein
            -----------
shall have the meanings given such terms in the Purchase Agreement or the
Memorandum, as the case may be.  As used in this Agreement, the following terms
shall have the following meanings:

           "Advice" shall have meaning set forth in Section 3(m).
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          "Affiliate" means, with respect to any Person, any other Person that
           ---------
directly or indirectly controls or is controlled by or under common control with
such Person.  For the purposes of this definition, "control," when used with
                                                    --------
respect to any Person, means the possession, direct or indirect, of the power to
direct or cause the direction of the management and policies of such Person,
whether through the ownership of voting securities, by contract or otherwise;
and the terms of "affiliated," "controlling" and "controlled" have meanings
                  -----------   -----------       ----------
correlative to the foregoing.

          "Board" shall have meaning set forth in Section 3(n).
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          "Business Day" means any day except Saturday, Sunday and any day which
           ------------
shall be a legal holiday or a day on which banking institutions in the State of
Texas generally are authorized or required by law or other government actions to
close.

          "Closing Date" means the date of the closing of the Purchase
           ------------
Agreement.

          "Commission" means the Securities and Exchange Commission.
           ----------

          "Common Stock" means the Company's common stock, $.001 par value per
           ------------
share.

          "Effectiveness Period" shall have the meaning set forth in Section 2.
           --------------------                                      ---------

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.
           ------------

          "Filing Date" means the 90th day following the Closing Date.
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                                        1
<PAGE>
          "Holder" or "Holders" means the holder or holders, as the case may be,
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from time to time of Registrable Securities pursuant to this Agreement or any
other similar agreement between the Company and such holder.

          "Indemnified Party" shall have the meaning set forth in Section 5(c).
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          "Indemnifying Party" shall have the meaning set forth in Section 5(c).
           ------------------                                      ------------

          "Losses" shall have the meaning set forth in Section 5(a).
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          "Memorandum" means the Company's Confidential Private Placement
           ----------
Memorandum dated April 20, 2005 with respect to the offer and sale of up to
$2,500,000 of Notes.

          "Notes" means the 8% Subordinated Convertible Promissory Notes due
           -----
2010 offered by the Company pursuant to the terms of the Memorandum and the
Purchase Agreement.

          "Note Shares" means the shares of Common Stock issuable upon
           -----------
conversion of the Notes.

          "Person" means an individual or a corporation, partnership, trust,
           ------
incorporated or unincorporated association, joint venture, limited liability
company, joint stock company, government (or an agency or political subdivision
thereof) or other entity of any kind.

          "Proceeding" means an action, claim, suit, investigation or proceeding
           ----------
(including, without limitation, an investigation or partial proceeding, such as
a deposition), whether commenced or threatened.

          "Prospectus" means the prospectus included in the Registration
           ----------
Statement (including, without limitation, a prospectus that includes any
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A promulgated under the
Securities Act), as amended or supplemented by any prospectus supplement, with
respect to the terms of the offering of any portion of the Registrable
Securities covered by the Registration Statement, and all other amendments and
supplements to the Prospectus, including post-effective amendments, and all
material incorporated by reference in such Prospectus.

          "Registrable Securities" means (i) the Notes, (ii) the Note Shares,
           ----------------------
(iii) any shares of Common Stock issuable upon the exercise of Warrants issued
to any broker-dealer or finder as compensation in connection with the financing
that is the subject of the Purchase Agreement, and (iv) any securities issued or
issuable with respect to such securities by way of a stock dividend or stock
split or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization with respect to any of the securities
referenced above.


                                        2
<PAGE>
          "Registration Statement" means the registration statements and any
           ----------------------
additional registration statements contemplated by Section 2 and Section 7(c),
                                                   ---------     ------------
including (in each case) the Prospectus, amendments and supplements to such
registration statement or Prospectus, including pre- and post-effective
amendments, all exhibits thereto, and all material incorporated by reference in
such registration statement.

          "Rule 144" means Rule 144 promulgated by the Commission pursuant to
           --------
the Securities Act, as such Rule may be amended from time to time, or any
similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

          "Rule 158" means Rule 158 promulgated by the Commission pursuant to
           --------
the Securities Act, as such Rule may be amended from time to time, or any
similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

          "Rule 415" means Rule 415 promulgated by the Commission pursuant to
           --------
the Securities Act, as such Rule may be amended from time to time, or any
similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

          "Securities Act" means the Securities Act of 1933, as amended.
           --------------

          "Warrants" means the Common Stock purchase warrant issued or issuable
           --------
to Northeast Securities, Inc. pursuant to an engagement letter with the Company.

          "Warrant Shares" means the shares of Common Stock issued or issuable
           --------------
upon exercise of the Warrants.

     2.    Mandatory Registration. On or before the Filing Date, the Company
           ----------------------
shall prepare and file with the Commission a Registration Statement covering all
Registrable Securities for an offering to be made on a continuous basis pursuant
to Rule 415.  The Registration Statement shall be on Form S-3 (except if the
Company is not then eligible to register for resale the Registrable Securities
on Form S-3, in which case such registration shall be on another appropriate
form).  The Company shall use its best efforts to cause the Registration
Statement to be declared effective under the Securities Act within 180 days
following the Closing Date or as promptly as possible after the filing thereof
and to keep such Registration Statement continuously effective under the
Securities Act until such date as is the earlier of (i) the date when all
Registrable Securities covered by such Registration Statement have been sold in
accordance with such Registration Statement or (ii) the date when all of the
Registrable Securities have been sold pursuant to Rule 144 or (iii) the date on
which the Registrable Securities are eligible to be sold without any restriction
pursuant to Rule 144(k) or (iv) the date when all of the Registrable Securities
cease to be outstanding provided that any and all Warrant Shares have been sold
pursuant to Section 2(i) or (ii) above or may be resold pursuant to Section
2(iii) above (the "Effectiveness Period").
                   --------------------


                                        3
<PAGE>
     3.     Registration Procedures. In connection with the Company's
            -----------------------
registration obligations hereunder, the Company shall:

          (a)     Prepare and file with the Commission on or prior to the Filing
Date, a Registration Statement on Form S-3 (or if the Company is not then
eligible to register for resale the Registrable Securities on Form S-3 such
registration shall be on another appropriate form) in accordance with the method
or methods of distribution thereof as specified by the Holders, and use its best
efforts to cause the Registration Statement to become effective and remain
effective as provided herein; provided, however, that not less than three (3)
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Business Days prior to the filing of the Registration Statement or any related
Prospectus or any amendment or supplement thereto (including any document that
would be incorporated therein by reference), the Company shall (i) furnish to
the Holders copies of all such documents proposed to be filed, which documents
(other than those incorporated by reference) will be subject to the review of
such Holders, and (ii) cause its officers and directors, counsel and independent
certified public accountants to respond to such inquiries as shall be necessary,
in the reasonable opinion of counsel to such Holders, to conduct a reasonable
investigation within the meaning of the Securities Act.  The Company shall not
file the Registration Statement or any such Prospectus or any amendments or
supplements thereto to which the Holders of a majority of the Registrable
Securities shall reasonably object in writing within two (2) Business Days of
their receipt thereof.

          (b)     (i) Prepare and file with the Commission such amendments,
including post-effective amendments, to the Registration Statement as may be
necessary to keep the Registration Statement continuously effective as to the
applicable Registrable Securities for the Effectiveness Period and prepare and
file with the Commission such additional Registration Statements in order to
register for resale under the Securities Act all of the Registrable Securities;
(ii) cause the related Prospectus to be amended or supplemented by any required
Prospectus supplement, and as so supplemented or amended to be filed pursuant to
Rule 424 (or any similar provisions then in force) promulgated under the
Securities Act; (iii) respond as promptly as possible to any comments received
from the Commission with respect to the Registration Statement or any amendment
thereto and as promptly as possible provide the Holders true and complete copies
of all correspondence from and to the Commission relating to the Registration
Statement; and (iv) comply in all material respects with the provisions of the
Securities Act and the Exchange Act with respect to the disposition of all
Registrable Securities covered by the Registration Statement during the
applicable period in accordance with the intended methods of disposition by the
Holders thereof set forth in the Registration Statement as so amended or in such
Prospectus as so supplemented.

          (c)     Notify the Holders of Registrable Securities to be sold as
promptly as possible (and, in the case of (i)(A) below, not less than three (3)
days prior to such filing) and (if requested by any such Person) confirm such
notice in writing no later than one (1) Business Day following the day (i)(A)
when a Prospectus or any Prospectus supplement or post-effective amendment to
the Registration Statement is proposed to be filed; (B) when the Commission
notifies the Company whether there will be a "review" of such Registration
Statement and whenever the Commission comments in writing on such Registration
Statement and (C) with respect to the Registration Statement or any
post-effective amendment, when the same has become effective; (ii) of any
request by the Commission or any other federal or state


                                        4
<PAGE>
governmental authority for amendments or supplements to the Registration
Statement or Prospectus or for additional information; (iii) of the issuance by
the Commission of any stop order suspending the effectiveness of the
Registration Statement covering any or all of the Registrable Securities or the
initiation of any Proceedings for that purpose; (iv) if at any time any of the
representations and warranties of the Company contained in any agreement
contemplated hereby ceases to be true and correct in all material respects; (v)
of the receipt by the Company of any notification with respect to the suspension
of the qualification or exemption from qualification of any of the Registrable
Securities for sale in any jurisdiction, or the initiation or threatening of any
Proceeding for such purpose; and (vi) of the occurrence of any event that makes
any statement made in the Registration Statement or Prospectus or any document
incorporated or deemed to be incorporated therein by reference untrue in any
material respect or that requires any revisions to the Registration Statement,
Prospectus or other documents so that, in the case of the Registration Statement
or the Prospectus, as the case may be, it will not contain any untrue statement
of a material fact or omit to state any material fact required to be stated
therein or necessary to make the statements therein, in the light of the
circumstances under which they were made, not misleading.

          (d)     Use its best efforts to avoid the issuance of, or, if issued,
obtain the withdrawal of, (i) any order suspending the effectiveness of the
Registration Statement or (ii) any suspension of the qualification (or exemption
from qualification) of any of the Registrable Securities for sale in any
jurisdiction, at the earliest practicable moment.

          (e)     If requested by the Holders of a majority in interest of the
Registrable Securities, (i) promptly incorporate in a Prospectus supplement or
post-effective amendment to the Registration Statement such information as the
Company reasonably agrees should be included therein and (ii) make all required
filings of such Prospectus supplement or such post-effective amendment as soon
as practicable after the Company has received notification of the matters to be
incorporated in such Prospectus supplement or post-effective amendment.

          (f)     Furnish to each Holder, without charge, at least one conformed
copy of each Registration Statement and each amendment thereto, including
financial statements and schedules, all documents incorporated or deemed to be
incorporated therein by reference, and all exhibits to the extent requested by
such Person (including those previously furnished or incorporated by reference)
promptly after the filing of such documents with the Commission.

          (g)     Promptly deliver to each Holder, without charge, as many
copies of the Prospectus or Prospectuses (including each form of prospectus) and
each amendment or supplement thereto as such Persons may reasonably request; and
the Company hereby consents to the use of such Prospectus and each amendment or
supplement thereto, during periods in which such Prospectus and each amendment
or supplement thereto are effective, by each of the selling Holders in
connection with the offering and sale of the Registrable Securities covered by
such Prospectus and any amendment or supplement thereto.


                                        5
<PAGE>
          (h)     Prior to any public offering of Registrable Securities, use
its best efforts to register or qualify or cooperate with the selling Holders in
connection with the registration or qualification (or exemption from such
registration or qualification) of such Registrable Securities for offer and sale
under the securities or Blue Sky laws of such jurisdictions within the United
States as any Holder requests in writing, to keep each such registration or
qualification (or exemption therefrom) effective during the Effectiveness Period
and to do any and all other acts or things necessary or advisable to enable the
disposition in such jurisdictions of the Registrable Securities covered by a
Registration Statement; provided, however, that the Company shall not be
required to qualify generally to do business in any jurisdiction where it is not
then so qualified or to take any action that would subject it to general service
of process in any such jurisdiction where it is not then so subject or subject
the Company to any material tax in any such jurisdiction where it is not then so
subject.

          (i)     Cooperate with the Holders to facilitate the timely
preparation and delivery of certificates representing Registrable Securities to
be sold pursuant to a Registration Statement, which certificates shall, if
required under the terms of this Agreement, be free of all restrictive legends,
and to enable such Registrable Securities to be in such denominations and
registered in such names as any Holder may request within the applicable time
periods prescribed for the issuance of shares upon exercise of Warrants.

          (j)     Upon the occurrence of any event contemplated by Section
                                                                   -------
3(c)(vi), as promptly as possible, prepare a supplement or amendment, including
--------
a post-effective amendment, to the Registration Statement or a supplement to the
related Prospectus or any document incorporated or deemed to be incorporated
therein by reference, and file any other required document so that, as
thereafter delivered, neither the Registration Statement nor such Prospectus
will contain an untrue statement of a material fact or omit to state a material
fact required to be stated therein or necessary to make the statements therein,
in the light of the circumstances under which they were made, not misleading.

          (k)     Use its best efforts to cause all Registrable Securities
relating to such Registration Statement to be listed on the OTC Bulletin Board,
Nasdaq SmallCap Market, Nasdaq National Market, American Stock Exchange and any
other securities exchange, quotation system or market, if any, on which similar
securities issued by the Company are then listed as and when required pursuant
to the Purchase Agreement.

          (l)     Comply in all material respects with all applicable rules and
regulations of the Commission and make generally available to its security
holders earning statements satisfying the provisions of Section 11(a) of the
Securities Act and Rule 158 not later than 45 days after the end of any 12-month
period (or 90 days after the end of any 12-month period if such period is a
fiscal year) commencing on the first day of the first fiscal quarter of the
Company after the effective date of the Registration Statement, which statement
shall conform to the requirements of Rule 158.


                                        6
<PAGE>
          (m)     If the Registration Statement refers to any Holder by name or
otherwise as the holder of any securities of the Company, then such Holder shall
have the right to require (if such reference to such Holder by name or otherwise
is not required by the Securities Act or any similar federal statute then in
force) the deletion of the reference to such Holder in any amendment or
supplement to the Registration Statement filed or prepared subsequent to the
time that such reference ceases to be required.

          Each Holder covenants and agrees that (i) it will not sell any
Registrable Securities under the Registration Statement until it has received
copies of the Prospectus as then amended or supplemented as contemplated in
Section 3(g) and notice from the Company that such Registration Statement and
------------
any post-effective amendments thereto have become effective as contemplated by
Section 3(c), (ii) it and its officers, directors or Affiliates, if any, will
------------
comply with the prospectus delivery requirements of the Securities Act as
applicable to them in connection with sales of Registrable Securities pursuant
to the Registration Statement and (iii) it will furnish to the Company
information regarding such Holder and the distribution of such Registrable
Securities as is required by law to be disclosed in the Registration Statement,
and the Company may exclude from such registration the Registrable Securities of
any such Holder who unreasonably fails to furnish such information within a
reasonable time after receiving such request.

          Each Holder agrees by its acquisition of such Registrable Securities
that, upon receipt of a notice from the Company of the occurrence of any event
of the kind described in Section 3(c)(ii), 3(c)(iii), 3(c)(iv), 3(c)(v) or
                         ----------------  ---------  --------  -------
3(c)(vi), such Holder will forthwith discontinue disposition of such Registrable
--------
Securities under the Registration Statement until such Holder's receipt of the
copies of the supplemented Prospectus and/or amended Registration Statement
contemplated by Section 3(j), or until it is advised in writing (the "Advice")
                ------------                                          ------
by the Company that the use of the applicable Prospectus may be resumed, and, in
either case, has received copies of any additional or supplemental filings that
are incorporated or deemed to be incorporated by reference in such Prospectus or
Registration Statement.

          (n)     If (i) there is material non-public information regarding the
Company which the Company's Board of Directors (the "Board") reasonably
                                                     -----
determines not to be in the Company's best interest to disclose and which the
Company is not otherwise required to disclose, or (ii) there is a significant
business opportunity (including, but not limited to, the acquisition or
disposition of assets (other than in the ordinary course of business) or any
merger, consolidation, tender offer or other similar transaction) available to
the Company which the Board reasonably determines not to be in the Company's
best interest to disclose, then the Company may postpone or suspend filing or
effectiveness of a registration statement for a period not to exceed 20
consecutive days, provided that the Company may not postpone or suspend its
obligation under this Section 3(n) for more than 45 days in the aggregate during
                      ------------
any 12 month period; provided, however, that no such postponement or suspension
shall be permitted for consecutive 20 day periods, arising out of the same set
of facts, circumstances or transactions.


                                        7
<PAGE>
     4.     Registration Expenses. All fees and expenses incident to the
            ---------------------
performance of or compliance with this Agreement by the Company, except as and
to the extent specified in this Section 4, shall be borne by the Company whether
                                ---------
or not the Registration Statement is filed or becomes effective and whether or
not any Registrable Securities are sold pursuant to the Registration Statement.
The fees and expenses referred to in the foregoing sentence shall include,
without limitation, (i) all registration and filing fees (including, without
limitation, fees and expenses (A) with respect to filings required to be made
with the OTC Bulletin Board, Nasdaq SmallCap Market, Nasdaq National Market,
American Stock Exchange and each other securities exchange or market on which
Registrable Securities are required hereunder to be listed, (B) with respect to
filings required to be made with the National Association of Securities Dealers,
Inc. and the NASD Regulation, Inc. and (C) in compliance with state securities
or Blue Sky laws), (ii) printing expenses (including, without limitation,
expenses of printing certificates for Registrable Securities and of printing
prospectuses if the printing of prospectuses is requested by the holders of a
majority of the Registrable Securities included in the Registration Statement),
(iii) messenger, telephone and delivery expenses, (iv) fees and disbursements of
counsel for the Company, (v) Securities Act liability insurance, if the Company
so desires such insurance, and (vi) fees and expenses of all other Persons
retained by the Company in connection with the consummation of the transactions
contemplated by this Agreement, including, without limitation, the Company's
independent public accountants (including the expenses of any comfort letters or
costs associated with the delivery by independent public accountants of a
comfort letter or comfort letters).  In addition, the Company shall be
responsible for all of its internal expenses incurred in connection with the
consummation of the transactions contemplated by this Agreement (including,
without limitation, all salaries and expenses of its officers and employees
performing legal or accounting duties), the expense of any annual audit, the
fees and expenses incurred in connection with the listing of the Registrable
Securities on any securities exchange as required hereunder.

     5.     Indemnification.
            ---------------

          (a)     Indemnification by the Company.  The Company shall,
                  ------------------------------
notwithstanding any termination of this Agreement, indemnify and hold harmless
the Holder, the officers, directors, agents, brokers (including brokers who
offer and sell Registrable Securities as principal as a result of a pledge or
any failure to perform under a margin call of Common Stock), investment advisors
and employees of each of them, each Person who controls the Holder (within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act)
and the officers, directors, agents and employees of each such controlling
Person, to the fullest extent permitted by applicable law, from and against any
and all losses, claims, damages, liabilities, costs (including, without
limitation, costs of preparation and attorneys' fees) and expenses
(collectively, "Losses") (as determined by a court of competent jurisdiction in
                ------
a final judgment not subject to appeal or review), as incurred, arising solely
out of based solely upon any untrue or alleged untrue statement of a material
fact contained in the Registration Statement, any Prospectus or any form of
prospectus or in any amendment or supplement thereto or in any preliminary
prospectus, or arising solely out of or based solely upon any omission or
alleged omission of a material fact required to be stated therein or necessary
to make the statements therein (in the case of any Prospectus or form of
prospectus or supplement thereto, in the light of the circumstances under which
they were made) not misleading, except to the extent, but only to the extent,
that such untrue statements or omissions are based solely upon information
regarding


                                        8
<PAGE>
the Holder or such other Indemnified Party furnished in writing to the Company
by the Holder expressly for use therein, which information was reasonably relied
on by the Company for use therein or to the extent that such information relates
to such Holder or the Holder's proposed method of distribution of Registrable
Securities and was reviewed and expressly approved in writing by the Holder
expressly for use in the Registration Statement, such Prospectus or such form of
Prospectus or in any amendment or supplement thereto.  The Company shall notify
the Holder promptly of the institution, threat or assertion of any Proceeding of
which the Company is aware in connection with the transactions contemplated by
this Agreement.

          (b)     Indemnification by Holder.  The Holder shall indemnify and
                  -------------------------
hold harmless the Company, the directors, officers, agents and employees, each
Person who controls the Company (within the meaning of Section 15 of the
Securities Act and Section 20 of the Exchange Act), and the directors, officers,
agents or employees of such controlling Persons, to the fullest extent permitted
by applicable law, from and against all Losses (as determined by a court of
competent jurisdiction in a final judgment not subject to appeal or review), as
incurred, arising solely out of or based solely upon any untrue statement or
alleged untrue statement of a material fact contained in the Registration
Statement, any Prospectus, or any form of prospectus or form of prospectus or in
any amendment or supplement thereto or in any preliminary prospectus, or arising
solely out of or based solely upon any omission of a material fact required to
be stated therein or necessary to make the statements therein (in the case of
any Prospectus or supplement thereto, in the light of the circumstances under
which they were made) not misleading, to the extent, but only to the extent,
that such untrue statement or omission or alleged untrue statement or omission
is contained in any information so furnished in writing by the Holder or other
Indemnified Party to the Company specifically for inclusion in the Registration
Statement or such Prospectus and that such information was reasonably relied
upon by the Company for use in the Registration Statement, such Prospectus or
such form of prospectus or to the extent that such information relates to the
Holder or the Holder's proposed method of distribution of Registrable Securities
and was reviewed and expressly approved in writing by the Holder expressly for
use in the Registration Statement, such Prospectus or such form of Prospectus.

          (c)     Conduct of Indemnification Proceedings.  If any Proceeding
                  --------------------------------------
shall be brought or asserted against any Person entitled to indemnity hereunder
(an "Indemnified Party"), such Indemnified Party promptly shall notify the
     -----------------
Person from whom indemnity is sought (the "Indemnifying Party") in writing, and
                                           -------------------
the Indemnifying Party shall assume the defense thereof, including the
employment of counsel reasonably satisfactory to the Indemnified Party and the
payment of all fees and expenses incurred in connection with defense thereof;
provided, however, that the failure of any Indemnified Party to give such notice
--------  -------
shall not relieve the Indemnifying Party of its obligations or liabilities
pursuant to this Agreement, except (and only) to the extent that it shall be
finally determined by a court of competent jurisdiction (which determination is
not subject to appeal or further review) that such failure shall have
proximately and materially adversely prejudiced the Indemnifying Party.


                                        9
<PAGE>
          An Indemnified Party shall have the right to employ separate counsel
in any such Proceeding and to participate in the defense thereof, but the fees
and expenses of such counsel shall be at the expense of such Indemnified Party
or Parties unless: (1) the Indemnifying Party has agreed in writing to pay such
fees and expenses; or (2) the Indemnifying Party shall have failed promptly to
assume the defense of such Proceeding and to employ counsel reasonably
satisfactory to such Indemnified Party in any such Proceeding; or (3) the named
parties to any such Proceeding (including any impleaded parties) include both
such Indemnified Party and the Indemnifying Party, and such Indemnified Party
shall have been advised by counsel (which shall be reasonably acceptable to the
Indemnifying Party) that a conflict of interest is likely to exist if the same
counsel were to represent such Indemnified Party and the Indemnifying Party (in
which case, if such Indemnified Party notifies the Indemnifying Party in writing
that it elects to employ separate counsel at the expense of the Indemnifying
Party, the Indemnifying Party shall not have the right to assume the defense
thereof and such counsel shall be at the expense of the Indemnifying Party).
The Indemnifying Party shall not be liable for any settlement of any such
Proceeding affected without its written consent, which consent shall not be
unreasonably withheld or delayed.  No Indemnifying Party shall, without the
prior written consent of the Indemnified Party, effect any settlement of any
pending Proceeding in respect of which any Indemnified Party is a party, unless
such settlement includes an unconditional release of such Indemnified Party from
all liability on claims that are the subject matter of such Proceeding.

          All fees and expenses of the Indemnified Party (including reasonable
fees and expenses to the extent incurred in connection with investigating or
preparing to defend such Proceeding in a manner not inconsistent with this
Section 5) shall be paid to the Indemnified Party, as incurred, within ten (10)
---------
Business Days of written notice thereof to the Indemnifying Party (regardless of
whether it is ultimately determined that an Indemnified Party is not entitled to
indemnification hereunder; provided, however, that the Indemnifying Party may
                           --------  -------
require such Indemnified Party to undertake to reimburse all such fees and
expenses to the extent it is finally judicially determined that such Indemnified
Party is not entitled to indemnification hereunder).

          (d)     Contribution.  If a claim for indemnification under Section
                  ------------                                        -------
5(a) or Section 5(b) is unavailable to an Indemnified Party because of a failure
----    ------------
or refusal of a governmental authority to enforce such indemnification in
accordance with its terms (by reason of public policy or otherwise), then each
Indemnifying Party, in lieu of indemnifying such Indemnified Party, shall
contribute to the amount paid or payable by such Indemnified Party as a result
of such Losses, in such proportion as is appropriate to reflect the relative
fault of the Indemnifying Party and Indemnified Party in connection with the
actions, statements or omissions that resulted in such Losses as well as any
other relevant equitable considerations.  The relative fault of such
Indemnifying Party and Indemnified Party shall be determined by reference to,
among other things, whether any action in question, including any untrue or
alleged untrue statement of a material fact or omission or alleged omission of a
material fact, has been taken or made by, or relates to information supplied by,
such Indemnifying, Party or Indemnified Party, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
action, statement or omission.  The amount paid or payable by a party as a
result of any Losses shall be deemed to include, subject to the limitations set
forth in Section 5(c), any reasonable attorneys' or other reasonable fees or
         ------------
expenses incurred by such party in connection with any Proceeding to the extent
such party would have been indemnified


                                       10
<PAGE>
for such fees or expenses if the indemnification provided for in this Section
was available to such party in accordance with its terms.

          The parties hereto agree that it would not be just and equitable if
contribution pursuant to this Section 5(d) were determined by pro rata
                              ------------
allocation or by any other method of allocation that does not take into account
the equitable considerations referred to in the immediately preceding paragraph.
No Person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any Person
who was not guilty of such fraudulent misrepresentation.

          The indemnity and contribution agreements contained in this Section
are in addition to any liability that the Indemnifying Parties may have to the
Indemnified Parties.  Notwithstanding the foregoing, the obligations of the
Holders hererin shall be the several, and not joint, obligation of each Holder
as to itself and not as to any other Holder.

     6.     Rule 144. Provided the Company is subject to the reporting
            --------
requirements of the Exchange Act, as long as the Holder owns Shares, the Company
covenants to timely file (or obtain extensions in respect thereof and file
within the applicable grace period) all reports required to be filed by the
Company after the date hereof pursuant to Section 13(a) or 15(d) of the Exchange
Act and to promptly furnish the Holders with true and complete copies of all
such filings.  As long as the Holder owns Notes Shares, if the Company is not
required to file reports pursuant to Section 13(a) or 15(d) of the Exchange Act,
it will prepare and furnish to the Holder and make publicly available in
accordance with Rule 144(c) promulgated under the Securities Act annual and
quarterly financial statements, together with a discussion and analysis of such
financial statements in form and substance substantially similar to those that
would otherwise be required to be included in reports required by Section 13(a)
or 15(d) of the Exchange Act, as well as any other information required thereby,
in the time period that such filings would have been required to have been made
under the Exchange Act.  The Company further covenants that it will take such
further action as the Holder may reasonably request, all to the extent required
from time to time to enable such Person to sell Note Shares without registration
under the Securities Act within the limitation of the exemptions provided by
Rule 144 promulgated under the Securities Act, including providing any legal
opinions relating to such sale pursuant to Rule 144.  Upon the request of the
Holder, the Company shall deliver to the Holder a written certification of a
duly authorized officer as to whether it has complied with such requirements.

     7.     Miscellaneous.

          (a)     Remedies.  In the event of a breach by the Company or by the
                  --------
Holder, of any of their obligations under this Agreement, the Holder or the
Company, as the case may be, in addition to being entitled to exercise all
rights granted by law and under this Agreement, including recovery of damages,
will be entitled to specific performance of its rights under this Agreement.
The Company and the Holder agree that monetary damages would not provide
adequate compensation for any losses incurred by reason of a breach by it of any
of the provisions of this Agreement and hereby further agrees that, in the event
of any action for specific performance in respect of such breach, it shall waive
the defense that a remedy at law would be adequate.


                                       11
<PAGE>
          (b)     No Inconsistent Agreements.  The Company has not, as of the
                  --------------------------
date hereof entered into and currently in effect, nor shall the Company, on or
after the date of this Agreement, enter into any agreement with respect to its
securities that is inconsistent with the rights granted to the Holder in this
Agreement or otherwise conflicts with the provisions hereof.

          (c)     Amendments and Waivers.  The provisions of this Agreement,
                  ----------------------
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the same shall be in writing and signed by the Company
and each of the Holders.  Notwithstanding the foregoing, a waiver or consent to
depart from the provisions hereof with respect to a matter that relates
exclusively to the rights of Holders and that does not directly or indirectly
affect the rights of other Holders may be given by Holders of at least a
majority of the Registrable Securities to which such waiver or consent relates;
provided, however, that the provisions of this sentence may not be amended,
modified, or supplemented except in accordance with the provisions of the
immediately preceding sentence.

          (d)     Notices.  Any and all notices or other communications or
                  -------
deliveries required or permitted to be provided hereunder shall be in writing
and shall be deemed given and effective on the earlier of (i) the date of
transmission, if such notice or communication is delivered via facsimile at the
facsimile telephone number specified for notice prior to 5:00 p.m., Houston
time, on a Business Day, (ii) the Business Day after the date of transmission,
if such notice or communication is delivered via facsimile at the facsimile
telephone number specified for notice later than 5:00 p.m., Houston time, on any
date and earlier than 11:59 p.m., Houston time, on such date, (iii) the Business
Day following the date of mailing, if sent by nationally recognized overnight
courier service or (iv) actual receipt by the party to whom such notice is
required to be given.  The addresses for such communications shall be with
respect to the Holder at its address set forth under its name on the signature
page hereto, or with respect to the Company, addressed to:

                         Houston American Energy Corp.
                         801 Travis, Suite 2020
                         Houston, Texas 77002
                         Attention:  Chief Executive Officer
                         Telecopier:  (713) 222-6966
                         Telephone:  (713) 222-6440

or to such other address or addresses or facsimile number or numbers as any such
party may most recently have designated in writing to the other parties hereto
by such notice.

          (e)     Successors and Assigns.  This Agreement shall be binding upon
                  ----------------------
and inure to the benefit of the parties and their successors and permitted
assigns and shall inure to the benefit of the Holder and its successors and
permitted assigns.  The Company may not assign this Agreement or any of its
rights or obligations hereunder without the prior written consent of the Holder.
Each Investor may assign its rights hereunder in the manner and to the Persons
as permitted under this Agreement and the Purchase Agreement.


                                       12
<PAGE>
          (f)     Assignment of Registration Rights.  The rights of the Holder
                  ---------------------------------
hereunder, including the right to have the Company register for resale
Registrable Securities in accordance with the terms of this Agreement, shall be
automatically assignable by the Holder to any Affiliate of the Holder or any
other Holder or Affiliate of any other Holder of all or a portion of the
Registrable Securities if:  (i) the Holder agrees in writing with the transferee
or assignee to assign such rights, and a copy of such agreement is furnished to
the Company within a reasonable time after such assignment, (ii) the Company is,
within a reasonable time after such transfer or assignment, furnished with
written notice of (a) the name and address of such transferee or assignee, and
(b) the securities with respect to which such registration rights are being
transferred or assigned, (iii) following such transfer or assignment the further
disposition of such securities by the transferee or assignees is restricted
under the Securities Act and applicable state securities laws, (iv) at or before
the time the Company receives the written notice contemplated by clause (ii) of
this Section, the transferee or assignee agrees in writing with the Company to
be bound by all of the provisions of this Agreement, and (v) such transfer shall
have been made in accordance with the applicable requirements of the Purchase
Agreement. In addition, each Holder shall have the right to assign its rights
hereunder to any other Person with the prior written consent of the Company,
which consent shall not be unreasonably withheld.  The rights to assignment
shall apply to the Holders (and to subsequent) successors and assigns.

          (g)     Counterparts.  This Agreement may be executed in any number of
                  ------------
counterparts, each of which when so executed shall be deemed to be an original
and, all of which taken together shall constitute one and the same Agreement.
In the event that any signature is delivered by facsimile transmission, such
signature shall create a valid binding obligation of the party executing (or on
whose behalf such signature is executed) the same with the same force and effect
as if such facsimile signature were the original thereof.

          (h)     Governing Law.  This Agreement shall be governed by and
                  -------------
construed in accordance with the laws of the State of Texas, without regard to
principles of conflicts of law thereof.

          (i)     Cumulative Remedies.  The remedies provided herein are
                  -------------------
cumulative and not exclusive of any remedies provided by law.

          (j)     Severability. If any term, provision, covenant or restriction
                  ------------
of this Agreement is held to be invalid, illegal, void or unenforceable in any
respect, the remainder of the terms, provisions, covenants and restrictions set
forth herein shall remain in full force and effect and shall in no way be
affected, impaired or invalidated, and the parties hereto shall use their
reasonable efforts to find and employ an alternative means to achieve the same
or substantially the same result as that contemplated by such term, provision,
covenant or restriction.  It is hereby stipulated and declared to be the
intention of the parties that they would have executed the remaining terms,
provisions, covenants and restrictions without including any of such that may be
hereafter declared invalid, illegal, void or unenforceable.

          (k)     Headings.  The headings herein are for convenience only, do
                  --------
not constitute a part of this Agreement and shall not be deemed to limit or
affect any of the provisions hereof.

                            [SIGNATURE PAGE FOLLOWS]


                                       13
<PAGE>
     IN WITNESS WHEREOF, the parties hereto have executed this Registration
Rights Agreement effective as of the date indicated below as the date the
Agreement is accepted by the Company.

COMPANY:                         HOUSTON AMERICAN ENERGY CORP.



Date:                , 2005      By:
      ----------------              --------------------------------------------
                                    John F. Terwilliger, Chief Executive Officer



INVESTOR:
                                 -----------------------------------------------
                                 Print Name of Investor

Date:                , 2005
      ----------------           -----------------------------------------------
                                 Signature of Individual Investor

                                 - OR -

                                 Signature of Investor Other than an Individual

                                 -----------------------------------------------
                                 Signature

                                 -----------------------------------------------
                                 Print Name

                                 -----------------------------------------------
                                 Title

                                 Address of Investor:

                                 -----------------------------------------------
                                 Street Address

                                 -----------------------------------------------
                                 City, State and Zip Code


                                       14