Director/PDMR Shareholding

GlaxoSmithKline PLC
05 January 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 in respect of the under-mentioned persons arising
from the purchase of Ordinary Shares at a price of £13.98 per Ordinary Share on
4 January 2007 through the Company's ShareReward Plan ("the Plan") which the
under-mentioned persons entered on 5 October 2001:


Mr J S Heslop                    Acquisition of 11 Ordinary Shares under the Dividend Reinvestment
                                 element of the Plan


Mr R Bondy                       Acquisition of 11 Ordinary Shares under the Dividend Reinvestment
                                 element of the Plan


Mr D Learmouth                   Acquisition of 11 Ordinary Shares under the Dividend Reinvestment
                                 element of the Plan


Dr D Pulman                      Acquisition of 6 Ordinary Shares under the Dividend Reinvestment element
                                 of the Plan


Mr C Viehbacher                  Acquisition of 3 Ordinary Shares under the Dividend Reinvestment element
                                 of the Plan


Mr A P Witty                     Acquisition of 11 Ordinary Shares under the Dividend Reinvestment
                                 element of the Plan





The Company and the above-mentioned persons were advised of this information on
5 January 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



5 January 2007


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