Director/PDMR Shareholding

GlaxoSmithKline PLC
24 May 2006



                GlaxoSmithKline plc Executive Directors' details



Further to the announcement dated 6 February 2006, the following details for Dr
Monsif Slaoui are provided in accordance with the requirements of the Financial
Services Authority's Listing Rules on his appointment to the Board of
GlaxoSmithKline plc with effect from 17 May 2006.



Dr Slaoui has not been a director of a publicly quoted company during the past
five years.



Dr Slaoui has interests in 38,820 Ordinary Shares of GlaxoSmithKline plc.  All
of these interests in Ordinary Shares were acquired prior to Dr Slaoui taking up
his appointment to the Board of GlaxoSmithKline plc.  Dr Slaoui also has an
interest directly and indirectly via his spouse in 134,500 Ordinary Shares
arising from the grant of options under the Company's share option schemes,
5,860 Ordinary Shares under the Company's Share Value Plan and 59,163 Ordinary
Shares under the Company's Performance Share Plan, all of which were granted
prior to his taking up his appointment as a director.





Paragraph 9.6.13 R (2) to (6) Financial Services Authority's Listing Rules



Dr Slaoui has no details to disclose in respect of paragraph 9.6.13 R (2) to (6)
of the Financial Services Authority's Listing Rules.



S M Bicknell
Company Secretary

24 May 2006


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