Director/PDMR Shareholding

GlaxoSmithKline PLC
16 April 2008


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

The Administrators of the SmithKline Beecham Mid-Term Incentive Plan notified
the Company and the under-mentioned persons on 15 April 2008 of an increase in
their interests in Ordinary share ADRs at a price of $43.84 per ADR following
the re-investment of the dividend paid to shareholders on 10 April 2008.


Dr JP Garnier                2,602.78
Mr E J Gray                     16.56
Mr D J Phelan                  501.10

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


S M Bicknell
Company Secretary

16 April 2008


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