House of Representatives (Thailand)

The House of Representatives (Thai: สภาผู้แทนราษฎร; RTGSSapha Phuthaen Ratsadon; IPA: [sà.pʰaː pʰûː.tʰɛːn râ:t.sà.dɔːn]) is the lower house of the National Assembly of Thailand, the legislative branch of the Thai government. The system of government of Thailand is that of a constitutional monarchy and a parliamentary democracy. The system of the Thai legislative branch is modelled after the Westminster system. The House of Representatives has 500 members, all of which are democratically elected: 350 members were elected through single member constituency elections, while the other 150 are elected through party lists distributed in a way which aims towards creating overall proportionality. The roles and powers of the House of Representatives were enshrined in the Constitution of 2017.

House of Representatives


Sapha Phuthaen Ratsadon
25th House of Representatives
Coat of arms or logo
Chuan Leekpai, Democrat
since 25 May 2019
First Deputy Speaker
Second Deputy Speaker
Suphachai Phosu, Bhumjaithai
since 26 May 2019
Prime Minister
Prayut Chan-o-cha
(suspended), Independent
since 22 May 2014
Acting Prime Minister
Prawit Wongsuwan
(acting), Palang Pracharath
since 24 August 2022
Government Chief Whip
Niroth Soonthornkaew, Palang Pracharath
since 9 November 2021
Leader of the Opposition
Chonlanan Srikaew, Pheu Thai
since 23 December 2021
Opposition Chief Whip
Sutin Klungsang, Pheu Thai
since 26 May 2019
Seats500 MPs
25th Thailand House of Representatives composition (2022).svg
Political groups
Government (258)

Opposition (210)

Crossbench (18)

Vacant (15)

  •   Vacant (15)
Mixed-member proportional representation:
First past the post (350 seats)
Compensatory party-list (150 seats)
Last election
24 March 2019
Next election
2023 or sooner
Meeting place

The House of Representatives was temporarily abolished as a result of the 2014 Thai coup d'état and replaced with the unicameral National Legislative Assembly, a body of 250 members, selected by the National Council for Peace and Order. After the promulgation of the 2017 Constitution in April 2017, the House of Representatives was reestablished but the constitution allowed the military National Legislative Assembly to remain in place until the House of Representatives was formed following the 2019 general election.[1]


The House of Representatives was established after the Revolution of 1932, when the Khana Ratsadon (the "People's Party"), overthrew the absolute monarchy and replaced it with a system of constitutional monarchy. When King Prajadhipok signed the temporary constitution of 1932, he established the first legislative assembly in Thailand, It was an entirely royally-appointed chamber. The first session of the People's Assembly was held on June 28, 1932, in the Ananta Samakhom Throne Hall. From then on, the House existed in various forms until it was abolished in 2014:

See more at: Constitutions of Thailand

  • 1946 – The 1946 constitution established a fully elected House of Representatives.
  • 1949 – On June 5, 1949, Orapin Chaiyakan became the first woman to be elected to hold a post in the National Assembly of Thailand (specifically, the House of Representatives).[2][3]
  • 1952 – Establishment of the unicameral National Assembly with 123 members.
  • 1959 – The House was banned by Sarit Dhanarajata.
  • 1968 – The House was re-established with 219 members.
  • 1972 – The House was banned by Thanom Kittikachorn.
  • 1974 – Establishment of the House of Representatives.
  • 1976 – Establishment of a unicameral National Assembly with 360 royally-appointed members.
  • 1978 – Return of an elected House with 301 members.
  • 1991 – Establishment of a unicameral National Assembly with 292 appointed members.
  • 1997 – Establishment of a 500-member House of Representatives, 400 directly elected with 100 elected through proportional representation.
  • 2006 – Following the coup, an interim charter was signed establishing a 250-member National Legislative Assembly.
  • 2007 – Return to 500-member House with 375 members elected through single constituency elections and 125 appointed through party-list proportional representation, established, by referendum under the 2007 Constitution of Thailand.
  • 2014 – Abolished as a result of the 2014 Thai coup d'état.
  • 2017 – Re-established following 2017 constitution promulgation.


The qualifications to be a candidate for the House of Representatives were outlined in Section 101, Part 2, Chapter 6 of the 2007 Constitution. The candidate had to be a citizen of Thailand by birth only, age of twenty-five or older on election day, and born in the province in which they intended to stand as a candidate. The candidate must have been a voter and therefore had to be on the electoral register for at least five years directly before the election, and must also had a house or have been in public service in the province for five years. The candidate must also had been a member of an educational institution in that province for at least five consecutive years. Politically, a candidate had to be a member of one political party for a period of at least ninety days before election day, except in cases of dissolution where thirty days was the minimum period. This was done to discourage party switching before the election. For party list candidates, they must also had to meet the same qualifications except for the provincial restrictions. They were instead divided in lists based on provincial groups.

Those specifically barred from being candidates were those: addicted to drugs, declared bankrupt, unable to vote (see voter eligibility below), former convicted felons (the individual had to wait for five years after release to become eligible), removed from public service for being corrupt or incompetent, had assets confiscated due to embezzlement and finally, the individual had not been a member of the government or civil service, Senate, local administrations, member of the judiciary or other independent agencies.


Before its abolishment, the House of Representatives had 500 members. 375 members were directly elected in single constituency elections by first-past-the-post voting. The 375 constituencies were divided by population according to the census and tambons. The other 125 members were voted based on 'proportional representation' it is actually in truth a parallel voting system or more precisely the Mixed Member Majoritarian system (MMM). In Thai general elections, voters had two votes: one to select the member of parliament for their constituencies and the second to choose which party they prefer. Seats were assigned to parties as a result through the d'Hondt method.

In accordance with the 2007 Constitution of Thailand, a general election was held every 4 years. Dissolution could happen anytime, which was done by the King with the advice of the prime minister through the use of the royal decree. Elections were held under universal suffrage; every voter had to be a citizen of Thailand, if not by birth then by being a citizen for 5 years. The voter had to be over 18 years old before the year the election was held. Voting in elections were also mandatory as missing an election would result in the loss of the right to be involved in political activities. Those barred from voting in House elections were members of the clergy, those suspended from the privilege for various reasons, detainees under legal or court orders and being of unsound mind or of mental infirmity.

Term and dissolutionEdit

The term of the House of Representatives was exactly four years from the previous election day. Upon the expiration of the House, the King would issue a decree calling for a general election of the House, in which the date of the election had to be announced. This had to be done within forty days of the expiration. The date of the election had to be the same for the entire Kingdom.

The King held the royal prerogative to dissolve the House before its expiration. When this happened a royal decree was issued where the election date was announced; this had to be done in no less than forty days and not more than sixty days from the date of the dissolution. The reasons and circumstances of a dissolution could be made only once.


Members of the House of Representatives were generally called Members of Parliament or MPs (Thai: สมาชิกสภาผู้แทนราษฎร or ส.ส.). The membership of the House of Representatives commenced on election day. If there was a vacancy in the membership of the House, and it was not due to expiration or dissolution, it had to be re-occupied. Vacancies could occur due to death, resignation, conviction and/or expulsion (only by a parliamentary party through a 3/4 majority vote). If the vacancy was of a constituency member then an election had to be held within forty days of the vacancy, unless it was less than 180 days of the present term of the House, then the vacancy could remain.

In the case where the vacancy was made by a proportional representative member, the vacancy would be filled by the Speaker of the House of Representatives by submitting the name of the next candidate in the party list (submitted on election day) to be published in the Royal Gazette. This had to be done within seven days. If no name was found then the vacancy could remain unfilled. Members of the House who had filled a vacancy under either of these procedures could only remain in the House for the remainder of its present term.

Power and privilegesEdit


According to the 2007 Constitution of Thailand, the House of Representatives was granted many powers, most of them were shared with Senate of Thailand. These common powers were:

  • Legislation
  • Scrutiny
  • Passing of annual appropriations bills
  • Constitutional amendments

Exclusive powers:

  • Primary legislative chamber.
  • Creating and appointing committees to examine bills.
  • Power to call ministers to account (by appearing in the chamber and answering questions)
  • Removal of the prime minister through a "vote of no confidence" (more than 1/5 to vote for a debate, and a simple majority for removal).
  • Removal of ministers (more than 1/6 to vote for a debate, and a simple majority for removal).
  • Selection of its officers.
  • Expulsion of members
  • Determination of its own rules and procedures.


No member of the House could be arrested, detained, or summoned by a warrant for an inquiry as the suspect in a criminal case unless permission of the House or the member was arrested in flagrante delicto.


Presiding officersEdit

The executive committee of House of Representatives consisted of one speaker and two deputy speakers to be its presiding officers. The Speaker of the House was also the ex officio President of the National Assembly of Thailand. The election was done by a secret ballot in the first session; after a resolution was passed; the elected would be formally approved by the King. The Speaker and Deputy Speakers of the House could not be members of the cabinet or any political party executive committee. The speaker and his deputies were not entitled to represent partisan interests and had to exercise their powers on a non-partisan basis.

Leader of the Governing CoalitionEdit

The Constitution stipulated that the Prime Minister and the Ministers had to be former members of the House of Representatives. After the first session, the House had to vote in a resolution to elect a Prime Minister, after which the King would formally approve him within thirty days. The Prime Minister-elect was always the leader of the largest party in the House. However, under the electoral system, the House resulted in a hung parliament. After the 2007 election, six parties formed a governing coalition, electing Samak Sundaravej of the largest party, People's Power Party (PPP), the Prime Minister.

On August 5, 2011, the House elected Yingluck Shinawatra as Prime Minister against Abhisit Vejjajiva of the Democrat Party, to a vote of 265 for and 159 against.

Leader of the OppositionEdit

After the appointment of the Cabinet, the King appointed the official Leader of the Opposition of Thailand. The Leader of the Opposition had to be the leader of the largest party with no members holding any ministerial positions. His party had to be larger than one fifth of the total number of the House. If no Party met this qualification then the Leader with most votes from parties with no ministerial positions would then be appointed. The Royal appointment had to be countersigned by the President of the National Assembly. The Leader of the Opposition led the Shadow Cabinet of Thailand.

See alsoEdit


  1. ^ Kendall, Dave (2019-01-06). "Explainer: New rules for the House of Representatives". Bangkok Post. Retrieved 2019-01-28.
  2. ^ Sopchokchai, Orapin. Female Members of Parliament, Women's Political Participation at the National Level Archived 2011-07-24 at the Wayback Machine, Women's Political Participation in Thailand, TDRI Quarterly Review, Vol. 13, No. 4, December 1998, pp. 11–20
  3. ^ Iwanaga, Kazuki. Women in Politics in Thailand Archived 2012-03-17 at the Wayback Machine, Working Paper No. 14, Centre for East and South-East Asian Studies, Lund University, Sweden, 2005

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