House of RepresentativesSenate

House of Representatives


Data on parliamentary sessions, parliamentary committees and parliamentary groups.


Number of ordinary sessions of parliament per year
Number of days parliament met in plenary, per year
See historical data for this field.
Notes For some parliaments, data can not be presented on an annual basis, for example because parliamentary sessions run from April to March of the following year. In such cases, the period to which the data corresponds is specified here.
Within fifteen days from announcing the general election results of the House of Representatives, the National Assembly is convoked for the first sitting of its members. There are two ordinary sessions per year which last one hundred and twenty days but the King may prolong this time period or convoke an extraordinary session. An ordinary session may be prorogued before the end of one hundred and twenty days only with the approval of the National Assembly. At least one-third of members of both houses may also lodge a petition with the President of the National Assembly to report to the King for issuance of an extraordinary session. (Section 121-123, 2017 Constitution of the Kingdom of Thailand B.E. 2560).

Until 24 May 2019 the parliament operated as a unicameral body, thus the parliament met for 31 days before, and the House of Representatives met separately from the Senate for 40 days after.
All languages recognized in the constitution can be used in plenary meetings Answer “Yes” includes the countries where only one language is recognized by the Constitution.


Number of permanent committees This number does not include sub-committees or joint committees in bicameral parliaments.
Number of permanent joint committees in bicameral parliaments

Parliamentary groups

Parliamentary groups are recognized in the parliamentary rules “Parliamentary groups” are the primary means by which political parties organize themselves in parliament. They may also be known as “party groups”, “caucuses” or “fractions”. They are different from all-party groups on specific issues, or inter-parliamentary friendship groups.
Number of parliamentary groups
See historical data for this field.
Not applicable. There is no minimum number of members to form a parliamentary group