Director/PDMR Shareholding

GlaxoSmithKline PLC
11 April 2008



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


The Administrators of the GlaxoSmithKline Executive Supplemental Savings Plan
notified the Company and the under-mentioned persons on 11 April 2008 of changes
in their interests in Ordinary share ADRs arising from an increase in their
interests under the Annual Investment Plan feature following the re-investment
of the dividend paid to shareholders on 10 April 2008 at a price of $43.84 per
ADR:-

Dr J P Garnier                                            596.14
Dr D Pulman                                                32.12

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


S M Bicknell
Company Secretary

11 April 2008


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