Director/PDMR Shareholding

GlaxoSmithKline PLC
10 July 2006


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


I give below details of changes in interests in the Ordinary Shares of
GlaxoSmithKline plc in respect of the under-mentioned persons, arising from the
purchase of Ordinary Shares on 6 July 2006 under a Single Company ISA at a price
of £15.29 per Ordinary Share:

Mr J Heslop                                                                  4
Mr A Witty                                                                   3

The Company and the above named persons were advised of this information on 10
July 2006.

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


S M Bicknell
Company Secretary

10 July 2006


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