Prime Minister of Thailand Prime Minister of Thailand The Prime Minister (; ; ) of Thailand 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. Prior to the coup d'état, the prime minister is nominated by a vote in the Thai House of Representatives by a simple majority, and is then appointed and 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
João Tamagnini Barbosa João Tamagnini Barbosa João Tamagnini de Sousa Barbosa (30 December 1883 – 15 December 1948), commonly known as João Tamagnini Barbosa (), or Tamagnini Barbosa, was a Portuguese military officer and politician of the Portuguese First Republic (1910–1926). He served as Minister of Interior, Colonies and Finances during the period known as ""New Republic"", after the coup d'état of the National Republican Party ("Sidonist Party") and the semi-dictatorial government of President/Prime Minister Sidónio Pais, followed by a brief participation in the provisional government of João do Canto e Castro after the assassination of Sidónio Pais. He briefly served as Prime