EXHIBIT 10.4

                     SOUTHWEST BANCORPORATION OF TEXAS, INC.

                             1996 STOCK OPTION PLAN

                  (AMENDED AND RESTATED AS OF JANUARY 24, 2000)

                             I. PURPOSE OF THE PLAN

      The SOUTHWEST BANCORPORATION OF TEXAS, INC. 1996 STOCK OPTION PLAN (the
"Plan") is intended to provide a means whereby certain employees of SOUTHWEST
BANCORPORATION OF TEXAS, INC., a Texas corporation (the "Company"), and its
subsidiaries may develop a sense of proprietorship and personal involvement in
the development and financial success of the Company, and to encourage them to
remain with and devote their best efforts to the business of the Company,
thereby advancing the interests of the Company and its shareholders.
Accordingly, the Company may grant to certain employees ("Optionees") the option
("Option") to purchase shares of the common stock, $1.00 par value, of the
Company ("Stock"), as hereinafter set forth. Options granted under the Plan may
be either incentive stock options, within the meaning of section 422(b) of the
Internal Revenue Code of 1986, as amended (the "Code"), ("Incentive Stock
Options") or options which do not constitute Incentive Stock Options.

                               II. ADMINISTRATION

      The Plan shall be administered by a committee (the "Committee") of, and
appointed by, the Board of Directors of the Company (the "Board"), and the
Committee shall be (a) comprised solely of two or more outside directors (within
the meaning of section 162(m) of the Code and applicable interpretive authority
thereunder), and (b) constituted so as to permit the Plan to comply with Rule
16b-3, as currently in effect or as hereinafter modified or amended ("Rule
16b-3"), promulgated under the Securities Exchange Act of 1934, as amended (the
"1934 Act"). The Committee shall have sole authority to select the Optionees
from among those individuals eligible hereunder and to establish the number of
shares which may be issued under each Option; provided, however, that,
notwithstanding any provision in the Plan to the contrary, the maximum number of
shares that may be subject to Options granted under the Plan to an individual
Optionee during any calendar year may not exceed 500,000 (subject to adjustment
in the same manner as provided in Paragraph VIII hereof with respect to shares
of Stock subject to Options then outstanding). The limitation set forth in the
preceding sentence shall be applied in a manner which will permit compensation
generated under the Plan to constitute "performance-based" compensation for
purposes of section 162(m) of the Code, including, without limitation, counting
against such maximum number of shares, to the extent required under section
162(m) of the Code and applicable interpretive authority thereunder, any shares
subject to Options that are canceled or repriced. In selecting the Optionees
from among individuals eligible hereunder and in establishing the number of
shares that may be issued under each Option, the Committee may take into account
the nature of the services rendered by such individuals, their present and
potential contributions to the Company's success and such other factors as the
Committee in its discretion shall deem relevant. The Committee is authorized to
interpret the Plan and may from time to time adopt such rules and regulations,
consistent with the provisions of the Plan, as it may deem advisable to carry
out the Plan. All decisions made by the Committee in

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selecting the Optionees, in establishing the number of shares which may be
issued under each Option and in construing the provisions of the Plan shall be
final. If a Committee is not appointed by the Board, the Board shall act as the
Committee for purposes of the Plan.

                             III. OPTION AGREEMENTS

      (a) Each Option shall be evidenced by a written agreement between the
Company and the Optionee ("Option Agreement") which shall contain such terms and
conditions as may be approved by the Committee. The terms and conditions of the
respective Option Agreements need not be identical. Specifically, an Option
Agreement may provide for the surrender of the right to purchase shares under
the Option in return for a payment in cash or shares of Stock or a combination
of cash and shares of Stock equal in value to the excess of the fair market
value of the shares with respect to which the right to purchase is surrendered
over the option price therefor ("Stock Appreciation Rights"), on such terms and
conditions as the Committee in its sole discretion may prescribe; provided,
that, except as provided in Subparagraph VIII(c) hereof, the Committee shall
retain final authority (i) to determine whether an Optionee shall be permitted,
or (ii) to approve an election by an Optionee, to receive cash in full or
partial settlement of Stock Appreciation Rights. Moreover, an Option Agreement
may provide for the payment of the option price, in whole or in part, by the
delivery of a number of shares of Stock (plus cash if necessary) having a fair
market value equal to such option price.

      (b) For all purposes under the Plan, the fair market value of a share of
Stock on a particular date shall be equal to the mean of the high and low sales
prices of the Stock (i) reported by the National Market System of NASDAQ on that
date or (ii) if the Stock is listed on a national stock exchange, reported on
the stock exchange composite tape on that date; or, in either case, if no prices
are reported on that date, on the last preceding date on which such prices of
the Stock are so reported. If the Stock is traded over the counter at the time a
determination of its fair market value is required to be made hereunder, its
fair market value shall be deemed to be equal to the average between the
reported high and low or closing bid and asked prices of Stock on the most
recent date on which Stock was publicly traded. In the event Stock is not
publicly traded at the time a determination of its value is required to be made
hereunder, the determination of its fair market value shall be made by the
Committee in such manner as it deems appropriate.

      (c) Each Option and all rights granted thereunder shall not be
transferable other than by will or the laws of descent and distribution or
pursuant to a qualified domestic relations order as defined by the Code or Title
I of the Employee Retirement Income Security Act of 1974, as amended, or the
rules thereunder, and shall be exercisable during the Optionee's lifetime only
by the Optionee or the Optionee's guardian or legal representative.

                           IV. ELIGIBILITY OF OPTIONEE

      Options may be granted only to individuals who are employees (including
officers and directors who are also employees) of the Company or any parent or
subsidiary corporation (as defined in section 424 of the Code) of the Company at
the time the Option is granted; provided, however, that Options which do not
constitute Incentive Stock Options may be granted to individuals who are
directors (but not also employees) of the Company or any such parent or
subsidiary

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corporation. Options may be granted to the same individual on more than one
occasion. No Incentive Stock Option shall be granted to an individual if, at the
time the Option is granted, such individual owns stock possessing more than 10%
of the total combined voting power of all classes of stock of the Company or of
its parent or subsidiary corporation, within the meaning of section 422(b)(6) of
the Code, unless (i) at the time such Option is granted the option price is at
least 110% of the fair market value of the Stock subject to the Option and (ii)
such Option by its terms is not exercisable after the expiration of five years
from the date of grant. To the extent that the aggregate fair market value
(determined at the time the respective Incentive Stock Option is granted) of
stock with respect to which Incentive Stock Options are exercisable for the
first time by an individual during any calendar year under all incentive stock
option plans of the Company and its parent and subsidiary corporations exceeds
$100,000, such excess Incentive Stock Options shall be treated as Options which
do not constitute Incentive Stock Options. The Committee shall determine, in
accordance with applicable provisions of the Code, Treasury Regulations and
other administrative pronouncements, which of an Optionee's Incentive Stock
Options will not constitute Incentive Stock Options because of such limitation
and shall notify the Optionee of such determination as soon as practicable after
such determination.

                          V. SHARES SUBJECT TO THE PLAN

      The aggregate number of shares which may be issued under Options granted
under the Plan shall not exceed 3,000,000 shares of Stock. Such shares may
consist of authorized but unissued shares of Stock or previously issued shares
of Stock reacquired by the Company. Any of such shares which remain unissued and
which are not subject to outstanding Options at the termination of the Plan
shall cease to be subject to the Plan, but, until termination of the Plan, the
Company shall at all times make available a sufficient number of shares to meet
the requirements of the Plan. Should any Option hereunder expire or terminate
prior to its exercise in full, the shares theretofore subject to such Option may
again be subject to an Option granted under the Plan to the extent permitted
under Rule 16b-3. The aggregate number of shares which may be issued under the
Plan shall be subject to adjustment in the same manner as provided in Paragraph
VIII hereof with respect to shares of Stock subject to Options then outstanding.
Exercise of an Option in any manner, including an exercise involving a Stock
Appreciation Right, shall result in a decrease in the number of shares of Stock
which may thereafter be available, both for purposes of the Plan and for sale to
any one individual, by the number of shares as to which the Option is exercised.
Separate stock certificates shall be issued by the Company for those shares
acquired pursuant to the exercise of an Incentive Stock Option and for those
shares acquired pursuant to the exercise of any Option which does not constitute
an Incentive Stock Option.

                                VI. OPTION PRICE

      The purchase price of Stock issued under each Option shall be determined
by the Committee, but in the case of an Incentive Stock Option, such purchase
price shall not be less than the fair market value of Stock subject to the
Option on the date the Option is granted.

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                                VII. TERM OF PLAN

      The Plan shall be effective upon the date of its adoption by the Board,
provided the Plan is approved by the shareholders of the Company within twelve
months thereafter. Notwithstanding any provision in this Plan or in any Option
Agreement, no Option shall be exercisable prior to such shareholder approval.
Except with respect to Options then outstanding, if not sooner terminated under
the provisions of Paragraph IX, the Plan shall terminate upon and no further
Options shall be granted after the expiration of ten years from the date of its
adoption by the Board.

                    VIII. RECAPITALIZATION OR REORGANIZATION

      (a) The existence of the Plan and the Options granted hereunder shall not
affect in any way the right or power of the Board or the shareholders of the
Company to make or authorize any adjustment, recapitalization, reorganization or
other change in the Company's capital structure or its business, any merger or
consolidation of the Company, any issue of debt or equity securities, the
dissolution or liquidation of the Company or any sale, lease, exchange or other
disposition of all or any part of its assets or business or any other corporate
act or proceeding.

      (b) The shares with respect to which Options may be granted are shares of
Stock as presently constituted, but if, and whenever, prior to the expiration of
an Option theretofore granted, the Company shall effect a subdivision or
consolidation of shares of Stock or the payment of a stock dividend on Stock
without receipt of consideration by the Company, the number of shares of Stock
with respect to which such Option may thereafter be exercised (i) in the event
of an increase in the number of outstanding shares shall be proportionately
increased, and the purchase price per share shall be proportionately reduced,
and (ii) in the event of a reduction in the number of outstanding shares shall
be proportionately reduced, and the purchase price per share shall be
proportionately increased.

      (c) If the Company recapitalizes, reclassifies its capital stock, or
otherwise changes its capital structure (a "recapitalization"), the number and
class of shares of Stock covered by an option theretofore granted shall be
adjusted so that such Option shall thereafter cover the number and class of
shares of stock and securities to which the Optionee would have been entitled
pursuant to the terms of the recapitalization if, immediately prior to the
recapitalization, the Optionee had been the holder of record of the number of
shares of Stock then covered by such Option. If (i) the Company shall not be the
surviving entity in any merger, consolidation or other reorganization (or
survives only as a subsidiary of an entity), (ii) the Company sells, leases or
exchanges all or substantially all of its assets to any other person or entity,
(iii) the Company is to be dissolved and liquidated, (iv) any person or entity,
including a "group" as contemplated by Section 13(d)(3) of the 1934 Act,
acquires or gains ownership or control (including, without limitation, power to
vote) of more than 50% of the outstanding shares of the Company's voting stock
(based upon voting power), or (v) as a result of or in connection with a
contested election of directors, the persons who were directors of the Company
before such election shall cease to constitute a majority of the Board (each
such event is referred to herein as a "Corporate Change"), then all outstanding
Options shall fully vest and become fully exercisable, effective as of the first
business day immediately preceding the effective date of such Corporate Change
(or as of an earlier date determined by the Committee pursuant to the following
clause); provided, however, that, subject to such acceleration of vesting of the
outstanding

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Options, no later than (a) ten days after the approval by the shareholders of
the Company of such merger, consolidation, reorganization, sale, lease or
exchange of assets or dissolution or such election of directors or (b) thirty
days after a change of control of the type described in Clause (iv), the
Committee, acting in its sole discretion without the consent or approval of any
Optionee, may, in its discretion, also act to effect one or more of the
following alternatives, which may vary among individual Optionees and which may
vary among Options held by any individual Optionee: (1) provide that the Options
may be exercised in full only for a limited period of time on or before a
specified date (before or after such Corporate Change) fixed by the Committee,
after which specified date all unexercised Options and all rights of Optionees
thereunder shall terminate, (2) require the mandatory surrender to the Company
by selected Optionees of some or all of the outstanding Options held by such
Optionees as of a date, before or after such Corporate Change, specified by the
Committee, in which event the Committee shall thereupon cancel such Options and
the Company shall pay to each Optionee an amount of cash per share equal to the
excess, if any, of the amount calculated in Subparagraph (d) below (the "Change
of Control Value") of the shares subject to such Option over the exercise
price(s) under such Options for such shares, (3) make such adjustments (other
than vesting) to Options then outstanding as the Committee deems appropriate to
reflect such Corporate Change or (4) provide that the number and class of shares
of Stock covered by an Option theretofore granted shall be adjusted so that such
Option shall thereafter cover the number and class of shares of stock or other
securities or property (including, without limitation, cash) to which the
Optionee would have been entitled pursuant to the terms of the agreement of
merger, consolidation or sale of assets and dissolution if, immediately prior to
such merger, consolidation or sale of assets and dissolution, the Optionee had
been the holder of record of the number of shares of Stock then covered by such
Option.

      (d) For the purposes of clause (2) in Subparagraph (c) above, the "Change
of Control Value" shall equal the amount determined in clause (i), (ii) or
(iii), whichever is applicable, as follows: (i) the per share price offered to
shareholders of the Company in any such merger, consolidation, reorganization,
sale of assets or dissolution transaction, (ii) the price per share offered to
shareholders of the Company in any tender offer or exchange offer whereby a
Corporate Change takes place, or (iii) if such Corporate Change occurs other
than pursuant to a tender or exchange offer, the fair market value per share of
the shares into which such Options being surrendered are exercisable, as
determined by the Committee as of the date determined by the Committee to be the
date of cancellation and surrender of such Options. In the event that the
consideration offered to shareholders of the Company in any transaction
described in this Subparagraph (d) or Subparagraph (c) above consists of
anything other than cash, the Committee shall determine the fair cash equivalent
of the portion of the consideration offered which is other than cash.

      (e) Any adjustment provided for in Subparagraphs (b) or (c) above shall be
subject to any required shareholder action.

      (f) Except as hereinbefore expressly provided, the issuance by the Company
of shares of stock of any class or securities convertible into shares of stock
of any class, for cash, property, labor or services, upon direct sale, upon the
exercise of rights or warrants to subscribe therefor, or upon conversion of
shares or obligations of the Company convertible into such shares or other
securities, and in any case whether or not for fair value, shall not affect, and
no adjustment by reason

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thereof shall be made with respect to, the number of shares of Stock subject to
Options theretofore granted or the purchase price per share.

                    IX. AMENDMENT OR TERMINATION OF THE PLAN

      The Board in its discretion may terminate the Plan at any time with
respect to any shares for which Options have not theretofore been granted. The
Board shall have the right to alter or amend the Plan or any part thereof from
time to time; provided, that no change in any Option theretofore granted may be
made which would impair the rights of the Optionee without the consent of such
Optionee; and provided, further, that (i) the Board may not make any alteration
or amendment which would decrease any authority granted to the Committee
hereunder in contravention of Rule 16b-3 and (ii) the Board may not make any
alteration or amendment which would materially increase the benefits accruing to
participants under the Plan, increase the aggregate number of shares which may
be issued pursuant to the provisions of the Plan, change the class of
individuals eligible to receive Options under the Plan or extend the term of the
Plan, without the approval of the shareholders of the Company.

                               X. SECURITIES LAWS

      (a) The Company shall not be obligated to issue any Stock pursuant to any
Option granted under the Plan at any time when the offering of the shares
covered by such Option have not been registered under the Securities Act of 1933
and such other state and federal laws, rules or regulations as the Company or
the Committee deems applicable and, in the opinion of legal counsel for the
Company, there is no exemption from the registration requirements of such laws,
rules or regulations available for the offering and sale of such shares.

      It is intended that the Plan and any grant of an Option made to a person
subject to Section 16 of the 1934 Act meet all of the requirements of Rule
16b-3. If any provision of the Plan or any such Option would disqualify the Plan
or such Option under, or would otherwise not comply with, Rule 16b-3, such
provision or Option shall be construed or deemed amended to conform to Rule
16b-3.

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