Director's resignation

Ref. No.ST/010/2004/0042 July 1, 2004 Subject : Director's Resignation To: Director and Manager 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. Anutin Charnvirakul has resigned from the position of director and President of the company, effective from June 28, 2004. Please be advised accordingly. Very Truly Yours, Ayuporn Wongkomet Assistant Vice President Investor Relations IR@stecon.co.th