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                              CENTRAL BANCORP, INC.
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                (Name of Registrant as Specified in Its Charter)


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                          [CENTRAL BANCORP LETTERHEAD]

Contact: William P. Morrissey
         Senior Vice President                          For Release: Immediately
         (617) 628-4000



                       INSTITUTIONAL SHAREHOLDER SERVICES
                     RECOMMENDS A VOTE FOR BOARD'S NOMINEES
                                       ---
                     IN CENTRAL BANCORP, INC. PROXY CONTEST


     Somerville,  Massachusetts (September 20, 2002) - Institutional Shareholder
Services,  Inc.  (ISS),  widely  recognized  as the  leading  independent  proxy
advisory firm in the nation,  has recommended a vote on the WHITE proxy card for
the  nominees  of the Board of  Central  Bancorp,  Inc.  (Nasdaq:  CEBK),  Marat
Santini,  John Gilgun and Paul Bulman,  in  opposition to the nominees of the PL
Capital Group. Central Bancorp's Annual Meeting of Stockholders is scheduled for
Monday, September 30, 2002.

     In its  recommendation,  ISS said  "Management has a business plan that has
provided  shareholders  with  significant  returns over the last five years. The
management  slate  of  nominees  has  expertise  and a  knowledge  base  of  the
community, which can assist the company's implementation of its business plan."

     In analyzing  the issues,  ISS  considered  the Company's  performance  and
stated:

           "A major issue raised by the  dissidents is the Company's  ability to
     survive  in  a  competitive  landscape.   However,  the  Company's  overall
     performance  especially  over the last year seems to refute  these  claims.
     Despite an economic downturn over the last two years, shareholders have not
     suffered but have in fact thrived  under the  incumbent  board  leadership.
     Therefore,  it is difficult  to maintain  that the company  cannot  sustain
     itself."

                                     * * * *

          "What is not in dispute is the Company's  stock  performance  over the
     last five years.  The Company  outperformed its industry peer group with an
     annualized return of 12.35 percent versus 9.02 percent. More significant is
     the Company's stock performance over the last year. The Company's return of
     31.09



     percent is double  the return of the  industry  peers of 15  percent.  This
     sustained performance weakens the dissident's claims that the company would
     have difficulty thriving in the intensely competitive Massachusetts banking
     environment.  Moreover, the Company's success over the last quarter further
     bolsters management's arguments."

     In discussing the Company's business plan, ISS stated:

           "In  summary,  the board  acknowledges  the  difficulties  that small
     community  banks have when faced with larger more  leveraged  institutions.
     However,  management  has taken steps  intended to take  advantage of these
     market conditions to create a special niche market for the Bank. It appears
     that  the  implementation  of this  plan  has  benefited  shareholders  and
     provided the foundation for the Company's current success."

     With regard to the qualifications of the nominees:

           "Thus,  the  management  candidates  can  assist  the  Company in the
     execution of its business  plan.  Since the Company  hopes to thrive within
     this niche market, it is essential that the Company have board members that
     understand the community in which they are serving."

     John D. Doherty,  President and Chief Executive Officer of Central Bancorp,
Inc. commented: "We are very pleased that ISS supports the Board's nominees. The
ISS  recommendation  reaffirms our belief that the Board's nominees are the more
qualified  nominees for  director.  More  importantly,  however,  ISS provides a
source  for all  stockholders,  both  big and  small,  who are  looking  for the
judgment of a neutral party,  well  experienced in these issues,  to guide their
vote."

     Stockholders  who  like  additional   information  on  voting  should  call
Georgeson Shareholder Services Inc. at (866) 367-5518.

     Central Bancorp, Inc., is the holding company for Central Bank, whose legal
name is Central Co-operative Bank, a  Massachusetts-chartered  co-operative bank
operating eight full-service banking offices in suburban Boston.