Director's Resignation

ST.010/2007/0052 December 4th, 2007 Subject: Director's Resignation Attention: The President The Stock Exchange of Thailand In compliance with the regulations of The Stock Exchange of Thailand, Sino-Thai Engineering and Construction Public Company Limited would like to report that Mr. Chaiyaphon Horrungruang - Director, has resigned from the position of director of the company, effective from December 5th, 2007. Please be advised accordingly. Yours sincerely, Mr. Woraphant Chontong SEVP. Financial and Administration Division