Director/PDMR Shareholding

GlaxoSmithKline PLC
13 July 2007


   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 12 July 2007 under a Single Company ISA at a
price of £12.70 per Ordinary Share:


Mr J S Heslop               5

Mr A P Witty                4



The Company and the above named persons were advised of this information on 13
July 2007.

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

13 July 2007


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