Director/PDMR Shareholding

GlaxoSmithKline PLC
31 July 2007


   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.





Sir Robert Wilson         Purchase of 5,000 Ordinary shares in
                          GlaxoSmithKline plc on 31 July 2007 at £12.53 per share.


The Company was advised of this transaction on 31 July 2007.



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





S M Bicknell

Company Secretary



31 July 2007


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