The Constitution of the Kingdom of Thailand, Buddhist Era 2550 (2007) (Thai: รัฐธรรมนูญแห่งราชอาณาจักรไทย พุทธศักราช ๒๕๕๐; rtgs: Rattha Thammanun Haeng Ratcha Anachak Thai Phuttha Sakkarat Song Phan Ha Roi Ha Sip) was the constitution of Thailand which was in effect from 2007 to 2014.
On 19 September 2006, the Royal Thai Armed Forces staged a coup d'état against then prime minister Thaksin Shinawatra, abrogated the 1997 constitution and formed a junta called Council for Democratic Reform (CDR). The 2006 interim constitution was then promulgated by King Bhumibol Adulyadej upon advice of the CDR leader, General Sonthi Boonyaratglin. The interim constitution established a Constitutional Convention (CC) and charged it with the duty to draft a new constitution before presenting the draft to the National Legislative Assembly (NLA), a legislature replacing the National Assembly abrogated by the CDR. The CC set up a constituent committee to draw up the draft. The committee consisted of thirty five members, of whom 25 were selected by the CC itself and the other 10 were selected by the CC upon advice of the CDR.
After the draft was approved by the CC and the NLA respectively, a national referendum was organised by the Election Commission on 19 August 2007, allowing the people to approve or deny the entire draft. 56.69 percent of the voters voted in favor of the draft, 41.37 percent voted against it and 1.94 percent were invalid votes. King Bhumibol Adulyadej signed it into law on 24 August 2007 and it came into force immediately.