William P. Morrissey
Senior Vice President                                                Immediately
(617) 628-4000

                 CENTRAL BANCORP REPORTS THIRD QUARTER EARNINGS

     SOMERVILLE,   MASSACHUSETTS,  January  28,  2003--  Central  Bancorp,  Inc.
(NASDAQ:  CEBK)  today  reported  net income of  $910,000,  or $0.58 per diluted
share,  for the three months ended December 31, 2002,  compared to $949,000,  or
$0.57 per diluted share, for the corresponding quarter in the prior fiscal year.

     For the nine months ended December 31, 2002, net income  increased 27.5% to
$2,605,000,  or $1.63 per diluted share,  from $2,043,000,  or $1.22 per diluted
share, in the year earlier  period.  Exclusive of the impact of gains and losses
on the sales and write-downs of investment  securities,  core earnings increased
49.5%  during the first nine months of the current  fiscal year  compared to the
same period in the prior year. The  elimination of goodwill  amortization in the
current  fiscal year, as required by a change in generally  accepted  accounting
principles, contributed $216,000 to the improved results in fiscal 2003.

     John D. Doherty, Chairman,  President & Chief Executive Officer, stated, "I
am pleased that we were able to sustain our improved  financial  performance for
this  fiscal  year,  as compared to last year,  by being  successful  in our two
primary business  functions,  namely,  originating loans and gathering deposits.
Loan originations  exceeded $50 million during the third quarter, a record level
for the Bank. In addition, core deposits increased at an annualized rate of over
25% during the current quarter."

     Mr.  Doherty  added,  "We have  implemented  our plan to create a  mortgage
banking  capability  to  increase  our  non-interest  income and  better  manage
interest  rate  risk,  which  has  contributed  greatly  to our  growth  in loan
origination  activity.  While the sales of loans through  December 31, 2002 were
not  significant,  we  have  committed  to  sell to  secondary  mortgage  market
investors  nearly $20  million of  recently  originated  fixed-rate  residential
mortgages.  The gains from these sales are expected to make a major contribution
to growth in the core components of non-interest income in the fourth quarter of
this fiscal year."

                                  (continued)

Central Bancorp, Inc.
Page 2 of 3

     The results for the quarter  ended  December 31,  2002,  as compared to the
same  period in the prior  year,  were  favorably  affected  by an  increase  of
$644,000 in net interest and dividend income. Such increase was largely due to a
59 basis  point  reduction  in the overall  cost of funds to 3.20%.  The Company
experienced an increase in its net interest margin to 3.73% in the most recently
completed  quarter from 3.63% in the same quarter of the prior fiscal year. With
the  sustained  low interest rate  environment  currently in existence,  and the
related record level of loan  refinancing  activity,  the Company believes it is
likely to  experience  some  compression  in its net interest  margin during the
upcoming year.

     Loan quality continued to be outstanding with no loans delinquent in excess
of 90 days at December 31, 2002. In addition, loan delinquencies continued to be
minimal and the Company held no foreclosed assets at 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 earnings report 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         Nine Months Ended
                                                December 31,            December 31,
                                           --------------------------------------------
                                             2002         2001        2002       2001
                                           --------------------------------------------
                                                 (Unaudited)             (Unaudited)
                                                                   
Net interest and dividend income           $  4,352    $  3,708    $ 12,748    $ 10,304

Net gain (loss) on sales and write-downs
  of investment securities                       14          16        (196)        339

Other non-interest income                       292         228         783         652

Non-interest expenses                         3,200       2,467       9,222       8,086
                                           --------    --------    --------    --------

  Income before taxes                         1,458       1,485       4,113       3,209

Provision for income taxes                      548         536       1,508       1,166
                                           --------    --------    --------    --------
  Net income                               $    910    $    949    $  2,605    $  2,043
                                           ========    ========    ========    ========

Earnings per share:

  Basic                                    $   0.58    $   0.57    $   1.64    $   1.23
                                           ========    ========    ========    ========

  Diluted                                  $   0.58    $   0.57    $   1.63    $   1.22
                                           ========    ========    ========    ========

Weighted average number of
  shares outstanding:
  Basic                                       1,569       1,657       1,584       1,661
                                           ========    ========    ========    ========

  Diluted                                     1,580       1,672       1,600       1,676
                                           ========    ========    ========    ========

RECONCILIATION OF GAAP
  EARNINGS TO CORE EARNINGS:
Net income per GAAP                        $    910    $    949    $  2,605    $  2,043
Net (gain) loss on sales and write-downs
  of investment securites, net of taxes          (9)        (11)        121        (220)
                                           --------    --------    --------    --------
  Core earnings                            $    901    $    938    $  2,726    $  1,823
                                           ========    ========    ========    ========


                         CONSOLIDATED BALANCE SHEET DATA
                                 (IN THOUSANDS)



                            DECEMBER 31,     March 31,
                               2002            2002
                            --------------------------
                            (UNAUDITED)
                                      
Total assets                $488,047        $468,219
Total loans (1)              399,988         371,707
Allowance for loan losses      3,276           3,292
Deposits                     286,721         261,907
Borrowings                   155,857         164,000
Stockholders' equity          41,090          38,954
<FN>
(1) Includes loans held for sale of $19,494 at December 31, 2002.
</FN>