Director/PDMR Shareholding

GlaxoSmithKline PLC
26 February 2008



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


I give below details of a change in the interests of Dr M Slaoui's Connected
Person, in the Ordinary shares of GlaxoSmithKline plc (the "Company") following
the acquisition of 213 shares at a price of £12.84 each, on 5 February 2008.

The administrators of the GlaxoSmithKline Share Value Plan (the "Plan") notified
the Company on 26 February 2008 that they had executed the above transaction to
correct an administrative error, which occurred following the release of Plan
shares on 3 December 2007 (announced on 4 December 2007 under RNS number 1837J).

This notification relates to a transaction notified under Disclosure and
Transparency Rule 3.1.4R(1)(a).


S M Bicknell
Company Secretary

26 February 2008



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