Director Declaration

GlaxoSmithKline PLC
04 February 2008


Further to an announcement made on 7 December 2007 relating to the appointments
of Andrew Witty and Christopher Viehbacher as Executive Directors of
GlaxoSmithKline plc with effect as of 31 January 2008, the following details are
provided in accordance with the requirements of the Financial Services
Authority's Listing Rules on their appointment to the Board of GlaxoSmithKline
plc.



Neither Mr Witty nor Mr Viehbacher has been a director of a publicly quoted
company during the past five years.



Neither Mr Witty nor Mr Viehbacher have any details to disclose in respect of LR
9.6.13R (2) to (6) of the Financial Services Authority's Listing Rules.



S M Bicknell

Company Secretary

4 February 2008


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