The 2012 PTT Thailand Open was a men's tennis tournament played on indoor hard courts.

It was the 10th edition of the Thailand Open, and part of the ATP World Tour 250 Series of the 2012 ATP World Tour.

It took place at the Impact Arena in Bangkok, Thailand, from 22 September through 30 September 2012.

Richard Gasquet won the singles title.

* Seeds are based on the rankings of September 17, 2012 [1] The following players received wildcards into the singles main draw: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: Richard Gasquet defeated Gilles Simon, 6–2, 6–1 Lu Yen-hsun / Danai Udomchoke defeated Eric Butorac / Paul Hanley, 6–3, 6–4