Before 1932; the Kingdom of Siam did not possess a legislature; as all legislative powers were vested in the person of the monarch. This has been the case since the foundation of the Sukhothai Kingdom in the 12th century; as the king was seen as a 'Dharmaraja' or King who rules in accordance with the Buddhist law of righteousness. However on 24 June 1932 a group of civilians and military officers; calling themselves the Khana Ratsadon (or People's Party) carried out a bloodless revolution; in which 150 years of absolute rule of the House of Chakri was ended. In its stead the group advocated a constitutional form of monarchy with an elected legislature.

The Draft Constitution of 1932 signed by King Prajadhipok; created Thailand's first legislature; a People's Assembly with 70 appointed members. The assembly met for the first time on 28 June 1932; in the Ananda Samakhom Throne Hall. The Khana Ratsadon decided that the people were not yet ready for an elected assembly; however they later changed their minds. By the time the 'permanent' constitution came into force in December of that year; elections were scheduled for 15 November 1933.