The defending champions were Jonas Björkman and Max Mirnyi; however, they lost in the quarterfinals against Mahesh Bhupathi and Radek Stepanek.
Mark Knowles and Daniel Nestor won the title, defeating ninth seeds Lukáš Dlouhý and Pavel Vizner in the final.
Wayne Black and Kevin Ullyett were the defending champions, but Black retired in 2006, and only Ullyett competed that year.
Ullyett partnered with Paul Hanley, but Bob Bryan and Mike Bryan defeated them 6–3, 7–5, in the final.
Mahesh Bhupathi and Leander Paes were the defending champions. They were both present but did not compete together.
Bhupathi partnered with Martin Damm, but lost in the quarterfinals to Wayne Black and Kevin Ullyett.
Paes partnered with Nenad Zimonjić, but lost in the second round to Jonathan Erlich and Andy Ram.
Oliver Marach and Michal Mertiňák were the defending champions, but did not compete together that year.
Marach partnered with Łukasz Kubot, but lost in the final to František Čermák and Mertiňák.
Mertiňák partnered with Čermák and won the final 4–6, 6–4, [10–7].
Michaël Llodra and Fabrice Santoro were the defending champions, and won the final 7–6(4), 6–3 against Bob and Mike Bryan.
Jonas Björkman and Kevin Ullyett were the defending champion, but Björkman was retired in November 2008.
Ullyett partnered up with Bruno Soares, and they won in the final 6–4, 7–6(7–4) against Simon Aspelin and Paul Hanley.
Karsten Braasch and Jens Knippschild were the defending champions but only Braasch competed that year with Thomas Shimada.
Àlex Corretja and Luis Lobo were the defending champions but they competed with different partners that year, Corretja with Lucas Arnold and Lobo with Martín García.
The 2005 Thailand Open was a tennis tournament played on indoor hard courts. It was the 3rd edition of the Thailand Open, and was part of the International Series of the 2005 ATP Tour. It took place at the Impact Arena in Bangkok, Thailand, from September 26 through October 2, 2005. Paul Hanley and Leander Paes won in the final 5–6(5–7), 6–1, 6–2, against Jonathan Erlich and Andy Ram
Simon Aspelin and Paul Hanley were the defending champions; however, Aspelin decided not to participate.
As a result, Hanley partnered up with Lukáš Dlouhý. They were eliminated by Sergiy Stakhovsky and Mikhail Youzhny in the quarterfinals.
Stakhovsky and Youzhny won this tournament, by defeating Jérémy Chardy and Feliciano López 4–6, 6–3, [10–3] in the final.
Martin Damm and Radek Štěpánek were the defending champions. Damm partnered with Leander Paes, losing in the semifinals. Štěpánek partnered with Tomáš Berdych, losing in the quarterfinals.
Wayne Arthurs and Paul Hanley were the defending champions. Arthurs partnered with Michaël Llodra this year, losing in the first round. Hanley partnered with Kevin Ullyett, winning the title again.
Enzo Artoni and Fernando Vicente were the defending champions. Artoni partnered with Marcin Matkowski this year, losing in the quarterfinals. Vicente did not participate.
Eric Butorac and Jean-Julien Rojer were the defending champions but decided not to participate together.
Butorac played alongside Bruno Soares, while Rojer partnered up with Aisam-ul-Haq Qureshi.
Butorac lost in the first round to Paul Hanley and Julian Knowle and Rojer lost in the semifinals to American Bob and Mike Bryan, who won the tournament defeating Oliver Marach and Filip Polášek 7–6(7–5), 6–3 in the final.
Paul Hanley and Jim Thomas were the defending champions, but Hanley did not participate this year. Thomas partnered Yves Allegro, losing in the quarterfinals.
Paul Hanley and Graydon Oliver were the defending champions, but Oliver did not participate this year. Hanley partnered Kevin Ullyett, losing in the semifinals.
Mario Ančić and Andy Ram were the defending champions, but Ančić did not participate this year. Ram partnered Jonathan Erlich, losing in the quarterfinals.
Arnaud Clément and Sébastien Grosjean were the defending champions, but did not partner together this year. Clément partnered Jaroslav Levinský, losing in the first round. Grosjean partnered Gaël Monfils, losing in the second round.
Mark Knowles and Daniel Nestor were the defending champions, but lost in the first round to Paul Goldstein and Jim Thomas.
Mahesh Bhupathi and Max Mirnyi were the defending champions, but lost in the quarterfinals to Michaël Llodra and Fabrice Santoro.
