Michael K. Devlin                                           Immediately
    Senior Vice President
    (617) 629-4244

                 CENTRAL BANCORP REPORTS RESULTS FOR ITS FOURTH
                  QUARTER AND FISCAL YEAR ENDED MARCH 31, 2003

     SOMERVILLE,  MASSACHUSETTS,  May 2, 2003-- Central Bancorp,  Inc.  (NASDAQ:
CEBK) today reported a net loss of $418,000, or $0.27 per diluted share, for the
quarter ended March 31, 2003,  compared to net income of $817,000,  or $0.50 per
diluted share, for the corresponding quarter in the prior fiscal year. A primary
reason for the current  quarter's  loss is the previously  announced  additional
state tax liability of approximately $835,000, net of tax benefits, attributable
to a recently enacted state law affecting  numerous  Massachusetts  banks, which
disallows the deduction for dividends received by Central Co-operative Bank from
its real estate  investment  trust (REIT)  subsidiary  for the 2000 through 2003
fiscal years. In addition,  the current quarter's results reflect an accrual for
the Company's  portion of the estimated cost of resolution of a commercial claim
filed in fiscal 2002 and legal fees incurred in the pending dispute with certain
shareholders  that,  together,  reduced  net income by  approximately  $915,000.
Exclusive of the foregoing significant items, pro forma earnings were $1,332,000
for the quarter ended March 31, 2003, compared to $817,000 for the corresponding
quarter in the prior fiscal year.

     For the year ended March 31, 2003, net income  amounted to  $2,187,000,  or
$1.37 per diluted share, compared to $2,860,000,  or $1.72 per diluted share, in
the year earlier period.  As noted in the preceding  paragraph,  the results for
fiscal 2003 were adversely impacted by certain  significant items, which, in the
aggregate,  reduced net income by  $1,915,000.  Exclusive  of these  significant
items,  pro forma  earnings were  $4,102,000  for the year ended March 31, 2003,
compared to $2,860,000  in the prior fiscal year.  The  elimination  of goodwill
amortization  in the current  fiscal year,  as required by a change in generally
accepted  accounting  principles,  contributed  $288,000  to the  year-over-year
improvement.

     John D. Doherty,  Chairman,  President & Chief Executive  Officer,  stated,
"While I am disappointed with the retroactive  aspect of the change in state tax
law affecting the  taxability of income of our REIT  subsidiary  and the cost of
litigation in our pending dispute with certain  shareholders,  I am pleased that
we were able to sustain our improved operating performance for this

                                  (continued)



Central Bancorp, Inc.
Page 2 of 3


fiscal year, as compared to last year. We continue to be encouraged by the early
success of our mortgage  banking  initiative and the continuing  progress of our
efforts to increase the commercial real estate loan  portfolio.  Commercial real
estate loan originations  exceeded  $48,000,000  during the year, a record level
for the Bank. In addition, core deposits increased 20% during the year."

     The results for the quarter  ended March 31, 2003,  as compared to the same
period in the prior year, were favorably  affected by an increase of $401,000 in
net interest and dividend  income,  an increase in gains on the sale of loans of
$768,000  and a reduction  of $376,000 in losses on the sale and  write-down  of
investment  securities.  The increase in net  interest  and dividend  income was
largely due to a 45 basis point reduction in the overall cost of funds to 2.96%.
The Company  commenced full operation of its mortgage banking  initiative during
the current  quarter,  which included the sale of loans  originated in the prior
quarter. As a result of the extraordinarily  high level of refinancing  activity
during the last six months of fiscal 2003,  the gains on loan sales  realized in
the quarter  ended March 31, 2003 were  considerably  higher than the  quarterly
level anticipated in the coming fiscal year.

     Loan quality continued to be outstanding with no loans delinquent in excess
of 90 days at March 31, 2003. In addition,  loan  delinquencies  continued to be
minimal  and the  Company  held no  foreclosed  assets at the end of the current
quarter.

     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 and one limited-service high school
branch in suburban Boston.


                           (See accompanying tables.)


- --------------------------------------------------------------------------------
     This press release  contains  financial  information  determined by methods
other than in  accordance  with  accounting  methods  generally  accepted in the
United States of America ("GAAP").  The Company's management uses these non-GAAP
measures in its analysis of the Company's performance.  These measures typically
adjust GAAP performance  measures to exclude the effects of significant gains or
losses that are unusual in nature.  Because  these items and their impact on the
Company's  performance  are  difficult  to  predict,  management  believes  that
presentations of financial  measures excluding the impact of these items provide
useful supplemental  information that is essential to a proper  understanding of
the operating results of the Company's core business.  These disclosures  should
not be viewed as a substitute  for  operating  results  determined in accordance
with GAAP, nor are they necessarily comparable to non-GAAP performance which may
be presented by other companies.

     This press release may contain certain  forward-looking  statements,  which
are based on management's current expectations  regarding economic,  legislative
and regulatory issues that may impact the Company's  earnings in future periods.
Factors  that  could  cause  future  results  to vary  materially  from  current
management  expectations  include,  but are not  limited  to,  general  economic
conditions,  changes in interest  rates,  deposit flows,  real estate values and
competition;  changes in accounting principles,  policies or guidelines; changes
in legislation or regulation;  and other  economic,  competitive,  governmental,
regulatory  and  technological   factors  affecting  the  Company's  operations,
pricing, products and services.
- --------------------------------------------------------------------------------




Central Bancorp, Inc.
Page 3 of 3

                              CENTRAL BANCORP, INC.
                           CONSOLIDATED OPERATING DATA
                      (IN THOUSANDS, EXCEPT PER SHARE DATA)


                                                        Quarter Ended           Year Ended
                                                           March 31,             March 31,
                                                    --------------------------------------------
                                                       2003       2002        2003        2002
                                                    --------------------------------------------
                                                         (Unaudited)
                                                                            
Net interest and dividend income                    $  4,511    $  4,110    $ 17,259    $ 14,413

Net loss on sales and write-downs
  of investment securities                              (113)       (489)       (309)       (150)
Gain on sale of loans                                    768          --         796          --
Other non-interest income                                163         186         918         838

Non-interest expenses                                  4,656       2,379      13,879      10,464
                                                    --------    --------    --------    --------
  Income before taxes                                    673       1,428       4,785       4,637

Provision for income taxes                             1,091         611       2,598       1,777
                                                    --------    --------    --------    --------
  Net income (loss)                                 $   (418)   $    817    $  2,187    $  2,860
                                                    ========    ========    ========    ========
Earnings (loss) per share:

  Basic                                             $  (0.27)   $   0.50    $   1.38    $   1.73
                                                    ========    ========    ========    ========
  Diluted                                           $  (0.27)   $   0.50    $   1.37    $   1.72
                                                    ========    ========    ========    ========
Weighted average number of
  shares outstanding:
  Basic                                                1,567       1,628       1,584       1,650
                                                    ========    ========    ========    ========
  Diluted                                              1,567       1,647       1,599       1,665
                                                    ========    ========    ========    ========

RECONCILIATION OF GAAP EARNINGS
 TO PRO FORMA EARNINGS:
Net income (loss) per GAAP                          $   (418)   $    817    $  2,187    $  2,860
                                                    --------    --------    --------    --------
Impact of REIT legislation, net of taxes                 835          --         835          --
Impact of litigation and legal fees, net of taxes        915          --       1,080          --
                                                    --------    --------    --------    --------
      Net impact                                       1,750          --       1,915          --
                                                    --------    --------    --------    --------
Pro forma earnings                                  $  1,332    $    817    $  4,102    $  2,860
                                                    ========    ========    ========    ========



                                                          CONSOLIDATED BALANCE SHEET DATA
                                                                 (IN THOUSANDS)

                                                          March 31,         March 31,
                                                            2003              2002
                                                          ---------------------------
                                                                      
        Total assets                                      $ 476,827         $ 468,219
        Total loans                                         390,464           371,707
        Allowance for loan losses                             3,284             3,292
        Deposits                                            287,939           261,907
        Borrowings                                          144,576           164,000
        Stockholders' equity                                 39,443            38,954