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KIRBY CORPORATION
                                                   CONTACT:  STEVE HOLCOMB
                                                             713-435-1135
FOR IMMEDIATE RELEASE
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                    KIRBY CORPORATION ANNOUNCES PLACEMENT OF
                            $200 MILLION SENIOR NOTES

     -     $200  MILLION  OF  SENIOR  NOTES  AT  LIBOR  PLUS  0.5%  DUE  2013

     -     PROCEEDS  USED  TO  REPAY  $200 MILLION OF SENIOR NOTES AT LIBOR PLUS
           1.2%

     -     PRIVATE PLACEMENT WILL SAVE $1.4 MILLION OF INTEREST EXPENSE, OR $.03
           PER  SHARE,  ANNUALLY.  KIRBY  WILL  EXPENSE  $1.1  MILLION  OF
           UNAMORTIZED FINANCING COSTS ASSOCIATED WITH REFINANCED NOTES.

     -     2005  SECOND  QUARTER  AND  FULL  YEAR  EARNINGS  PER  SHARE GUIDANCE
           UNCHANGED

HOUSTON,  TEXAS  (MAY  31,  2005) - Kirby Corporation ("Kirby") (NYSE:KEX) today
announced  the  private  placement of $200 million of senior notes ("2005 Senior
Notes")  with  the  assistance of Banc of America Securities LLC.  The unsecured
floating  rate  2005  Senior  Notes  have  an  interest rate equal to the London
Interbank  Offered Rate ("LIBOR") plus 0.5%.  No principal payments are required
until maturity in February 2013.  The 2005 Senior Notes are callable, at Kirby's
option, with a 2% prepayment premium during the first year, 1% during the second
year  and  at  par  thereafter.

Proceeds  of  the  2005  Senior Notes were used to repay Kirby's $200 million of
senior notes ("2003 Senior Notes") due February 2013.  The 2003 Senior Notes had
an interest rate equal to LIBOR plus 1.2%.  With the early extinguishment of the
2003  Senior  Notes, Kirby will expense in the 2005 second quarter approximately
$1.1  million,  or  $.03  per  share after taxes, of unamortized financing costs
associated  with  the  2003  Senior  Notes.

Joe  Pyne,  Kirby's  President  and Chief Executive Officer, commented, "The new
$200  million  private placement loan will replace Kirby's 2003 Senior Notes and
will  result  in  $1.4  million  of annual interest savings at the current level
outstanding.  Kirby  also has a $150 million bank revolving line of credit which
is  substantially  unused  at  this time."  Mr. Pyne further commented, "Kirby's
earnings  per  share  guidance ranges for the second quarter of 2005 and for the
full  year  are  unchanged  at  $.65  to $.70 and $2.45 to $2.55, respectively."


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Kirby  Corporation,  based  in  Houston,  Texas, operates inland tank barges and
towing  vessels,  transporting  petrochemicals,  black  oil  products,  refined
petroleum  products  and  agricultural  chemicals  throughout  the United States
inland  waterway  system.  Through  the  diesel  engine  services segment, Kirby
provides  after-market  service  for  large  medium-speed  and high-speed diesel
engines  and  reduction  gears  used  in  marine,  power generation and railroad
applications.

Statements  contained  in  this  press  release  with  respect to the future are
forward-looking  statements.  These  statements  reflect management's reasonable
judgment  with  respect  to  future  events.  Forward-looking statements involve
risks  and  uncertainties.  Actual  results  could  differ materially from those
anticipated  as  a  result  of  various  factors,  including  cyclical  or other
downturns in demand, significant pricing competition, unanticipated additions to
industry  capacity,  changes  in  the  Jones  Act or in U.S. maritime policy and
practice,  fuel costs, interest rates, weather conditions, and timing, magnitude
and the number of acquisitions made by Kirby.  A list of additional risk factors
can  be  found in Kirby's annual report on Form 10-K for the year ended December
31,  2004,  filed  with  the  Securities  and  Exchange  Commission.


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