CENTRAL ILLINOIS PUBLIC SERVICE COMPANY
               First Mortgage Bonds, Medium-Term Note Series
                                     
                               AMENDMENT TO
                                     
                          DISTRIBUTION AGREEMENT



                                                             March 18, 1997


SMITH BARNEY INC.
388 Greenwich Street
New York, New York  10013

FIRST CHICAGO CAPITAL MARKETS, INC.
One First National Plaza
Chicago, Illinois  60670

MORGAN STANLEY & CO. INCORPORATED
1251 Avenue of the Americas
New York, New York  10020


Dear Sirs:

     Central Illinois Public Service Company, an Illinois corporation, (the
"Company"),  and  each  of you have entered into a Distribution  Agreement,
dated June 1, 1995 (the "Agreement"), with respect to the issue and sale by
the  Company  of  the  Medium-Term Notes described therein  (the  "Notes").
Because  the Company has filed a registration statement with the Securities
and  Exchange  Commission  for  the sale  of  additional  Bonds  under  the
Agreement and because First Trust National Association has succeeded to the
trustee's  duties under the Indenture, the parties hereto desire  to  amend
the  Agreement  as  set forth below.  Terms used and not otherwise  defined
herein have the meanings set forth in the Agreement.

1.   The Agreement is amended as follows:

     (a)  The  introductory paragraphs are hereby deleted in their entirety
          and replaced with the following:
          
                Central Illinois Public Service Company, an Illinois
          corporation  (the "Company"), confirms its agreement  with
          Smith Barney Inc., First Chicago Capital Markets, Inc. and
          Morgan Stanley & Co. Incorporated (and any other agent who
          becomes a party hereto as specified in Section 1(a)) (each
          referred to as an "Agent" and collectively referred to  as
          the  "Agents") with respect to the issue and sale  by  the
          Company  of  its  First Mortgage Bonds,  Medium-Term  Note
          Series described herein (the "Bonds").  The Bonds will  be
          issued  under the Indenture of Mortgage or Deed  of  Trust
          dated  October 1, 1941, executed by the Company  to  First
          Trust   National   Association,  Chicago,   Illinois,   as
          successor   trustee  (the  "Trustee")  and  an  individual
          successor  co-trustee (collectively, the  "Trustees"),  as
          previously supplemented and amended by supplemental  trust
          indentures  and as to be further supplemented and  amended
          by  a supplemental trust indenture relating to each series
          of  Bonds (such Indenture of Mortgage or Deed of Trust  as
          so  supplemented and amended and as to be so  supplemented
          and  amended  is  referred to as the  "Indenture").   Each
          series  of  Bonds shall have the maturity date  or  dates,
          interest  rate  or  rates,  and,  if  any,  optional   and
          mandatory redemption provisions and other terms set  forth
          in  the  Prospectus referred to below as it may be amended
          or  supplemented from time to time.  Each series of  Bonds
          will   be   issued,  and  the  terms  and  rights  thereof
          established,  from  time  to  time  by  the   Company   in
          accordance with the Indenture.  As of March 18, 1997,  the
          Company  has  authorized the issuance and sale  of  up  to
          $145,000,000 aggregate principal amount of Bonds (of which
          $20,000,000  has  been  issued as  of  the  date  of  this
          Amendment)  through the Agents pursuant to  the  terms  of
          this  Agreement  (subject to the Company establishing  the
          terms of such Bonds or required by the Indenture).  It  is
          understood,  however, that the Company may  from  time  to
          time  authorize the issuance of additional Bonds and  that
          such additional Bonds may be sold through or to the Agents
          pursuant to the terms of this Agreement, all as though the
          issuance  of  such Bonds were authorized as  of  the  date
          hereof.
          
               This Agreement provides both for the sale of Bonds by
          the  Company  directly to purchasers, in  which  case  the
          Agents  will  act as agents of the Company  in  soliciting
          Bond purchases, and (as may from time to time be agreed to
          by  the  Company and the applicable Agent) to an Agent  as
          principal for resale to purchasers.
          
                The  Company  has  filed  with  the  Securities  and
          Exchange Commission (the "SEC") registration statements on
          Form  S-3  (No.  33-56063  and  No.  333-18473)  for   the
          registration  of  debt  securities  and  preferred  stock,
          including the Bonds, under the Securities Act of 1933,  as
          amended  (the  "1933 Act"), and the offering thereof  from
          time to time in accordance with Rule 415 of the rules  and
          regulations of the SEC under the 1933 Act (the  "1933  Act
          Regulations").   Such  registration statements  have  been
          declared   effective  by  the  SEC.    Such   registration
          statements (and any further registration statements  which
          may be filed by the Company for the purpose of registering
          additional  Bonds  and  in  connection  with  which   this
          Agreement is included or incorporated by reference  as  an
          exhibit)  and the prospectus constituting a part  thereof,
          and  any  prospectus  supplements relating  to  the  Bonds
          (including supplements filed pursuant to Rule 424(b)(3) of
          the   1933   Act  Regulations),  including  all  documents
          incorporated  therein by reference, as from time  to  time
          amended   or  supplemented  by  the  filing  of  documents
          pursuant to the Securities Exchange Act of 1934 (the "1934
          Act") or the 1933 Act or otherwise, are referred to herein
          as  the  "Registration  Statement" and  the  "Prospectus",
          respectively, except that if any revised prospectus  shall
          be  provided  to  the  Agents by the Company  for  use  in
          connection  with the offering of the Bonds  which  is  not
          required  to  be  filed by the Company  pursuant  to  Rule
          424(b)  of the 1933 Act Regulations, the term "Prospectus"
          shall refer to such revised prospectus from and after  the
          time it is first provided to each Agent for such use.
          
     (b)  All  references  in  the Agreement to "Bank of America  Illinois"
          shall  be  deemed  to  be  references to  "First  Trust  National
          Association".
     
     (c)  All  references  in  the Agreement to the "ICC  Order"  shall  be
          deemed  to be references to the most recently obtained  order  or
          orders  authorizing the issuance of Bonds in a  principal  amount
          not  less  than   the  then current amount of Bonds  the  Company
          determines shall be authorized for sale under the Agreement.
          
      If  the foregoing is in accordance with the Agents' understanding  of
this  amendment to the Agreement, please sign and return to the  Company  a
counterpart  hereof, whereupon this instrument along with all  counterparts
will  become  a  binding agreement between the Agents and  the  Company  in
accordance with its terms.

                         Very truly yours,
                         
                         CENTRAL ILLINOIS PUBLIC SERVICE COMPANY
                         
                         
                         
                         By:
                         Name:
                         Title:
                           
Accepted:

SMITH BARNEY INC.


By:
Name:
Title:


FIRST CHICAGO CAPITAL MARKETS, INC.


By:
Name:
Title:


MORGAN STANLEY & CO. INCORPORATED


By:
Name:
Title: