EXHIBIT 4(B)
 
                                TRUST AGREEMENT
                                      OF
                             HECO CAPITAL TRUST I
 
  THIS TRUST AGREEMENT is made as of December 31, 1996 (the "Trust
Agreement"), by and among Hawaiian Electric Company, Inc., a Hawaii
corporation, as Depositor (the "Depositor"), The Bank of New York as trustee
(the "Property Trustee"), The Bank of New York (Delaware), a Delaware banking
corporation, as trustee (the "Delaware Trustee"), and T. Michael May, Paul A.
Oyer and Marvin H. Hawthorne, not individually but in their capacity as
trustees (collectively, together with the Property Trustee and the Delaware
Trustee, the "Trustees"). The Depositor and the Trustees hereby agree as
follows:
 
  1. The trust created hereby shall be known as "HECO Capital Trust I" (the
     "Trust"), in which name the Trustees or the Depositor, to the extent
     provided herein, may conduct the business of the Trust, make and execute
     contracts, and sue and be sued.
 
  2. The Depositor hereby assigns, transfers, conveys and sets over to the
     Trust the sum of $10. Such amount shall constitute the initial trust
     estate. It is the intention of the parties hereto that the Trust created
     hereby constitute a business trust under Chapter 38 of Title 12 of the
     Delaware Code, 12 Del. C. (S)3801, et seq. (the "Business Trust Act"),
     and that this document constitute the governing instrument of the Trust.
     The Trustees are hereby authorized and directed to execute and file a
     certificate of trust with the Delaware Secretary of State in such form
     as the Trustees may approve.
 
  3. The Depositor and the Trustees will enter into an amended and restated
     Trust Agreement or Declaration satisfactory to each such party and
     substantially in the form to be included as an exhibit to the
     Registration Statement on Form S-3 (the "1933 Act Registration
     Statement") referred to below, or in such other form as the Trustees and
     the Depositor may approve, to provide for the contemplated operation of
     the Trust created hereby and the issuance of the Preferred Securities
     and Common Securities referred to therein. Prior to the execution and
     delivery of such amended and restated Trust Agreement or Declaration,
     the Trustees shall not have any duty or obligation hereunder or with
     respect of the trust estate, except as otherwise required by applicable
     law or as may be necessary to obtain prior to such execution and
     delivery any licenses, consents or approvals required by applicable law
     or otherwise. Notwithstanding the foregoing, the Trustees may take all
     actions deemed proper as are necessary to effect the transactions
     contemplated herein.
 
  4. The Depositor, as the sponsor of the Trust, is hereby authorized (i) to
     file with the Securities and Exchange Commission (the "Commission") and
     to execute, in the case of the 1933 Act Registration Statement and 1934
     Act Registration Statement (as herein defined), on behalf of the Trust,
     (a) the 1933 Act Registration Statement, including pre-effective or
     post-effective amendments to such Registration Statement, relating to
     the registration under the Securities Act of 1933, as amended (the "1933
     Act"), of the Preferred Securities of the Trust, (b) any preliminary
     prospectus or prospectus supplement thereto relating to the Preferred
     Securities required to be filed under the 1933 Act, and (c) a
     Registration Statement on Form 8-A or other appropriate form (the "1934
     Act Registration Statement") (including all pre-effective and post-
     effective amendments thereto) relating to the registration of the
     Preferred Securities of the Trust under the Securities Exchange Act of
     1934, as amended; (ii) to file with the New York Stock Exchange or other
     exchange, and execute on behalf of the Trust a listing application and
     all other applications, statements, certificates, agreements and other
     instruments as shall be necessary or desirable to cause the Preferred
     Securities to be listed on the New York Stock Exchange or such other
     exchange; (iii) to file and execute on behalf of the Trust such
     applications, reports, surety bonds, irrevocable consents, appointments
     of attorney for service

 
     of process and other papers and documents as shall be necessary or
     desirable to register the Preferred Securities under the securities or
     "Blue Sky" laws of such jurisdictions as the Depositor, on behalf of the
     Trust, may deem necessary or desirable; and (iv) to execute, deliver and
     perform on behalf of the Trust an underwriting agreement with the
     Depositor and the underwriter or underwriters of the Preferred
     Securities of the Trust. In the event that any filing referred to in
     clauses (i)-(iii) above is required by the rules and regulations of the
     Commission, the New York Stock Exchange or other exchange, or state
     securities or Blue Sky laws to be executed on behalf of the Trust by the
     Trustees, the Trustees, in their capacities as trustees of the Trust,
     are hereby authorized and directed to join in any such filing and to
     execute on behalf of the Trust any and all of the foregoing, it being
     understood that the Trustees, in their capacities as trustees of the
     Trust, shall not be required to join any such filing or execute on
     behalf of the Trust any such document unless required by the rules and
     regulations of the Commission, the New York Stock Exchange or other
     exchange, or state securities or Blue Sky laws. In connection with all
     of the foregoing, the Trustees, solely in their capacities as trustees
     of the Trust, and the Depositor hereby constitute and appoint any one or
     more of Paul A. Oyer, Marvin A. Hawthorne, Curtis Y. Harada, David J.
     Reber and Gregory R. Kim, with power in any one of them to act singly,
     as his, her or its, as the case may be, true and lawful attorney-in-fact
     and agent, with full power of substitution and resubstitution for the
     Depositor or in the Depositor's name, place and stead, in any and all
     capacities, to sign any and all amendments (including all pre-effective
     and post-effective amendments) to the 1933 Act Registration Statement
     and the 1934 Act Registration Statement and to file the same, with all
     exhibits thereto, and any other documents in connection therewith, with
     the Commission, granting unto said attorney-in-fact and agent full power
     and authority to do and perform each and every act and thing requisite
     and necessary to be done in connection therewith, as fully to all
     intents and purposes as the Depositor might or could do in person,
     hereby ratifying and confirming all that said attorney-in-fact and agent
     or his respective substitute or substitutes, shall do or cause to be
     done by virtue hereof.
 
  5. This Trust Agreement may be executed in one or more counterparts.
 
  6. The number of trustees of the Trust initially shall be five (5) and
     thereafter the number of trustees of the Trust shall be such number as
     shall be fixed from time to time by a written instrument signed by the
     Depositor which may increase or decrease the number of trustees of the
     Trust; provided, however, that to the extent required by the Business
     Trust Act, one trustee of the Trust shall either be a natural person
     which is a resident of the State of Delaware or, if not a natural
     person, an entity which has its principal place of business in the State
     of Delaware. The Delaware Trustee represents and warrants that it has
     and will retain its principal place of business in the State of
     Delaware. Subject to the foregoing, the Depositor is entitled to appoint
     or remove without cause any trustee of the Trust at any time. Any
     trustee of the Trust may resign upon thirty days' prior notice to the
     Depositor.
 
  7. This Trust Agreement shall be governed by, and construed in accordance
     with, the laws of the State of Delaware (without regard to conflict of
     laws principles).
 
  IN WITNESS WHEREOF, the parties hereto have caused this Trust Agreement to
be duly executed as of the day and year first above written.
 
                                        Hawaiian Electric Company, Inc. as
                                         Depositor
 
                                                   /s/ Paul A. Oyer
                                        By: ___________________________________
                                          Paul A. Oyer,
                                          Financial Vice President and
                                          Treasurer
 
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                                                 /s/ Marvin A. Hawthorne
                                          By: _________________________________
                                            Marvin A. Hawthorne,
                                            Assistant Treasurer
 
                                          THE BANK OF NEW YORK, not in its
                                           individual capacity but solely as
                                           trustee of the Trust
 
                                                   /s/ Vivian Georges
                                          By: _________________________________
                                            Name: Vivian Georges
                                            Title: Assistant Vice President
 
                                          THE BANK OF NEW YORK (DELAWARE), not
                                           in its individual capacity but
                                           solely as trustee of the Trust
 
                                                    /s/ Joseph Ernst
                                          By: _________________________________
                                            Name: Joseph Ernst
                                            Title: Assistant Vice President
 
                                          T. Michael May, not in his
                                           individual capacity, but solely as
                                           trustee of the Trust
 
                                                   /s/ T. Michael May
                                          By: _________________________________
                                                        Signature
 
                                          Paul A. Oyer, not in his individual
                                           capacity, but solely as trustee of
                                           the Trust
 
                                                    /s/ Paul A. Oyer
                                          By: _________________________________
                                                        Signature
 
                                          Marvin A. Hawthorne, not in his
                                           individual capacity, but solely as
                                           trustee of the Trust
 
                                                 /s/ Marvin A. Hawthorne
                                          By: _________________________________
                                                        Signature
 
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