Director/PDMR Shareholding

GlaxoSmithKline PLC
03 April 2007


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

I give below details of changes in interests in the Ordinary Shares of
GlaxoSmithKline plc in respect of the under-mentioned person:-

   30 March 2007              Sale of 3,220 Ordinary Shares on behalf of 
                              Mrs C Witty at a price of £13.93 per share.

The Company was advised of this transaction on 2 April 2007.

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

S M Bicknell
Company Secretary

3 April 2007




                      This information is provided by RNS
            The company news service from the London Stock Exchange