- May 4, 2021
- 3,294
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Legislative Chamber | Government | Opposition |
Lower House ![]() | Thai Rak Thai Party (244) Eco-Socialist Alliance (110) Libertarian Socialist Front (42) Feminist Socialist Coalition (21) | Democrat Party (69) Conservative Party (58) Anarcho-Communist Federation (24) Marxist Unity Party (32) |
Upper House ![]() | Thai Rak Thai Party (49) Eco-Socialist Alliance (31) Libertarian Socialist Front (47) Feminist Socialist Coalition (20) | Democrat Party (17) Conservative Party (30) Anarcho-Communist Federation (22) Marxist Unity Party (34) |
The National Assembly of the Republic of Thailand is the supreme legislative body of Thailand where it meets at the Sappaya-Sapasathan in Bangkok. The National Assembly possesses legislative supremacy and thereby holds ultimate power over all other political bodies in Thailand, including the provincial assembly and community assemblies across the country. As a bicameral legislature, it is separated into the Lower House (Hall of the Sum) and the Upper House (Hall of the Moon).
The Hall of the Sun is the elected lower chamber of the National Assembly, with elections to 350 single-member constituencies and 250 party-list members held at least every four years under the mixed-member proportional representation (MMPR) system. By constitutional convention, all government ministers, including the prime minister, are members of the Hall of the Sun, or less commonly the Hall of the Moon, and are thereby accountable to the respective branches of the legislature. Most Cabinet ministers are from the Lower House, while junior ministers can be from either house.
The Hall of the Moon is the elected upper chamber of the National Assembly, with election to 250 party-list members under the proportional representation (PR) system held at least six months to one year after the lower chamber election. By constitutional conventions, the Upper House is responsible for scrutinizing the Lower House legislative and decision-making, while also maintaining a supreme authority over the provincial assemblies, thus acting as the de facto representative of provincial-based interests within the National Assembly. In exercising this authority, the Upper House can delay legislation and require changes to such a legislation if it is in conflict with the national interests or consensus among the affected provincial administration.
The Hall of the Sun is the elected lower chamber of the National Assembly, with elections to 350 single-member constituencies and 250 party-list members held at least every four years under the mixed-member proportional representation (MMPR) system. By constitutional convention, all government ministers, including the prime minister, are members of the Hall of the Sun, or less commonly the Hall of the Moon, and are thereby accountable to the respective branches of the legislature. Most Cabinet ministers are from the Lower House, while junior ministers can be from either house.
The Hall of the Moon is the elected upper chamber of the National Assembly, with election to 250 party-list members under the proportional representation (PR) system held at least six months to one year after the lower chamber election. By constitutional conventions, the Upper House is responsible for scrutinizing the Lower House legislative and decision-making, while also maintaining a supreme authority over the provincial assemblies, thus acting as the de facto representative of provincial-based interests within the National Assembly. In exercising this authority, the Upper House can delay legislation and require changes to such a legislation if it is in conflict with the national interests or consensus among the affected provincial administration.
![]() Padipat Suntipada Speaker of the House of Representatives President of the National Assembly | ![]() Wan Muhamad Noor Matha Speaker of the House of Senate Vice President of the National Assembly |

Meeting place of the National Assembly of Thailand and world's largest parliament building, Sappaya-Sapasathan

Abhisit Vejjajiva, the Leader of the Opposition of the Republic of Thailand
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