The president of the National Assembly is the presiding officer (speaker) of the National Assembly of Thailand. Since 1997, the office has been an ex officio position occupied by the speaker of the House of Representatives of Thailand. The president is therefore an MP, usually from the majority party in the House of Representatives. The president is elected at the beginning of a House session immediately after an election, there are no term limits for the office. In the aftermath of the Coup d'état in 2014, the function of legislative assembly was turned over to the junta-controlled National Legislative Assembly, which Pornpetch Wichitcholchai, President of the National Legislative Assembly, is occupying ex officio position of President of the National Assembly.

The National Assembly of Thailand is the bicameral legislative branch of the government of Thailand. It convenes in the Sappaya-Sapasathan, Dusit District, Bangkok.