The Prime Minister of Thailand (Thai: นายกรัฐมนตรีไทย; rtgs: Nayok Ratthamontri Thai) is the head of government of Thailand. The Prime Minister is also the chair of the Cabinet of Thailand. The post has existed since the Revolution of 1932, when the country became a constitutional monarchy.
The Prime Minister is appointed by a vote in the Thai House of Representatives by a simple majority, and is then sworn-in by the King of Thailand. The House's selection is usually based on the fact that either the prime minister is the leader of the largest political party in the lower house or the leader of the largest coalition of parties. In accordance with the constitution, the prime minister can only be appointed twice and is therefore limited to a maximum of two consecutive terms. The post of Prime Minister is currently held by General Prayut Chan-o-cha, since the coup d'état on 22 May 2014.