The 2004 Thailand Open was a tennis tournament played on indoor hard courts. It was the 2nd edition of the Thailand Open, and was part of the International Series of the 2004 ATP Tour. It took place at the Impact Arena in Bangkok, Thailand, from September 27 through October 3, 2004.
Roger Federer def. Andy Roddick, 6–4, 6–0
- It was Roger Federer's 10th title of the year, also his 21st overall.
Justin Gimelstob / Graydon Oliver def. Yves Allegro / Roger Federer, 5–7, 6–4, 6–4