| 23rd House of Representatives | |
| Body: | National Assembly of Thailand |
| Country: | Thailand |
| Meeting Place: | Parliament House of Thailand |
| Election: | 2007 Thai general election |
| Government: | Samak cabinet (unitl 18 September 2008) Somchai cabinet (unitl 19 December 2008) Abhisit cabinet |
| Opposition: | Democrat Party (until 17 December 2008) Pheu Thai Party and 2 opposition parties |
| Term Start: | 23 December 2007 |
| Term End: | 10 May 2011 |
| Before: | 22nd |
| After: | 24th |
| Chamber1: | House of Representatives |
| Chamber1 Image: | 23rd Thailand House of Representatives composition (2009-2011).svg |
| Membership1: | 480 |
| Control1: | People's Power Party (until 2 December 2008) Democrat Party |
| Chamber1 Leader1 Type: | Speaker |
| Chamber1 Leader1: | Yongyut Tiyapairach (until 15 May 2008) Chai Chidchob |
| Chamber1 Leader2 Type: | First Deputy Speaker |
| Chamber1 Leader2: | Samart Kaewmeechai Somsak Kiatsuranont (until 13 August 2008) |
| Chamber1 Leader3 Type: | Second Deputy Speaker |
| Chamber1 Leader3: | Apiwan Wiriyachai |
| Chamber1 Leader4 Type: | Prime Minister |
| Chamber1 Leader4: | Samak Sundaravej (until 9 September 2008) Somchai Wongsawat (until 2 December 2008) Abhisit Vejjajiva |
| Chamber1 Leader5 Type: | Leader of the Opposition |
| Chamber1 Leader5: | Abhisit Vejjajiva (until 17 December 2008) |
| Session1 Start: | 21 January 2008 |
| Session1 End: | 20 May 2008 |
| Session2 Start: | 1 August 2008 |
| Session2 End: | 28 November 2008 |
| Session3 Start: | 21 January 2009 |
| Session3 End: | 20 May 2009 |
| Session4 Start: | 1 August 2009 |
| Session4 End: | 28 November 2009 |
| Session5 Start: | 21 January 2010 |
| Session5 End: | 20 May 2010 |
| Session6 Start: | 1 August 2010 |
| Session6 End: | 28 November 2010 |
| Session7 Start: | 21 January 2011 |
| Session7 End: | 10 May 2011 |
| Special Session1 Start: | 15 January 2008 |
| Special Session1 End: | 9 January 2009 |
| Special Session2 Start: | 25 May 2009 |
| Special Session2 End: | 22 June 2009 |
| Special Session3 Start: | 24 May 2010 |
| Special Session3 End: | 3 June 2010 |
The 23rd House of Representatives of Thailand consisted of 480 members elected in the 23 December 2007 election, and served until its dissolution on 10 May 2011.
It saw three prime ministerships: those of Samak Sundaravej (29 January – 8 September 2008), Somchai Wongsawat (8 September – 2 December 2008), and Abhisit Vejjajiva (17 December 2008 – 5 August 2011).
The house's third vote for prime minister was held on 15 December 2008. After the People's Power Party was dissolved by the Constitutional Court on 2 December 2008, Somchai Wongsawat was banned from politics for 5 years. He was then removed along with several other members of the Cabinet. Chaovarat Chanweerakul was appointed acting Prime Minister until House Speaker Chai Chidchob sent a letter inviting members to attend the choosing of a prime minister on 15 December 2008, at 09:30-11:30. Banyat Bantadtan proposed Abhisit Vejjajiva, while Sanoh Thienthong proposed Pracha Promnok.
| Candidate | Party | Votes | % | |
|---|---|---|---|---|
| Abhisit Vejjajiva | Democrat | 235 | 53.65 | |
| Pracha Promnok | Pueu Pandin | 198 | 45.21 | |
| Invalid/blank votes | 3 | 0.68 | ||
| Abstentions | 2 | 0.46 | ||
| Total votes | 436 | 99.54 | ||
| Total seat | 438 | 100.00 | ||
| Party | Abhisit Vejjajiva | Pracha Promnok | No votes | No attend | Total | |
|---|---|---|---|---|---|---|
| Pheu Thai | - | 178 | - | - | 178 | |
| Democrat | 163 | - | 1 | 1 | 165 | |
| Pueu Pandin | 12 | 9 | - | - | 21 | |
| Chartthaipattana | 14 | 1 | - | - | 15 | |
| Bhumjaithai | 8 | 3 | - | - | 11 | |
| Chart Pattana | 5 | 2 | 1 | 1 | 9 | |
| Pracharaj Party | - | 5 | - | - | 5 | |
| Newin Friend Group | 22 | - | 1 | - | 23 | |
| Others | 11 | - | - | - | 11 | |
| Total | 235 | 198 | 3 | 2 | 438 |