Director/PDMR Shareholding

GlaxoSmithKline PLC
25 May 2006


   Notification of Transactions of Directors, Persons Discharging Managerial
                      Responsibility or Connected Persons


I give below details of changes in the interests of Directors, Persons
Discharging Managerial Responsibility or Connected Persons in the Ordinary
Shares of GlaxoSmithKline plc.


22 May 2006     Abacus (GSK) Trustees Limited, as trustee of the
                GlaxoSmithKline Employee Trust, ("the GSK Trust"), transferred
                17,827 Ordinary Shares in the Company to participants in the
                SmithKline Beecham Employee Share Option Plan 1991.


The Company was advised of these transactions on 24 May 2006.

The GSK Trust is a discretionary trust of which all employees or former
employees of GlaxoSmithKline plc and its subsidiaries are potential
beneficiaries. Three of the Company's directors, Dr J-P Garnier, Dr T Yamada and
Mr J S Heslop are therefore interested in the shares held in the GSK Trust from
time to time in the same way as other employees or former employees of
GlaxoSmithKline plc and its subsidiaries.

This notification relates to a transaction notified in accordance with
Disclosure Rule 3.1.4R(1)(b).


S M Bicknell
Company Secretary

25 May 2006


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