Chatichai Choonhavan was a Thai army officer, diplomat and politician. From 1986 to 1991, he was the chairman of the Thai Nation Party and served as the Prime Minister of Thailand from August 1988 until the 1991 coup d'état.

Thai Nation Party, or Chart Thai Party was a conservative political party in Thailand. It was dissolved by the Constitutional Court of Thailand on December 2, 2008, along with the People's Power Party and the Neutral Democratic Party, for having violated electoral laws in the 2007 Thai general election. Thereafter, most MPs founded the Chart Thai Pattana Party, which became the Thai Nation Party's successor.