The Constitution of Thailand — Twenty Documents in 92 Years Because Coups Keep Hitting Reset.
Thailand — Constitution Profile
| 📅 Current Constitution | April 6, 2017 |
| 🏛️ Government | Unitary Parliamentary Constitutional Monarchy |
| 🌍 Capital | Bangkok |
| 📄 Total Constitutions | 20 since 1932 |
| 🪖 Military Coups | At least 13–19 since 1932 |
| 👑 Continuous Thread | Constitutional Monarchy — every version |
The Country That Rewrites Its Constitution Almost Every Four Years
If you wanted to find a real-world case study in extreme constitutional instability, Thailand would be near the top of any list on earth.
Since the abolition of the absolute monarchy in 1932, Thailand has had 20 charters or constitutions. Many changes followed military coups, reflecting the high degree of political instability in the country.
Since the coup of 1932, Thailand has had 20 constitutions and charters with a series of intervening military coups. New leaders following military coups often sought legitimization and stability by writing new constitutions, thus promulgating a persistent cycle of military coups usurping power, new leaders suspending constitutions, and then legitimating their power with new constitutions until a perceived crisis leading to another coup.
It is a cycle so well-documented in Thai political history that it essentially has its own name — write, rule, collapse, repeat.
A World Record Almost Nobody Wants to Hold
Thailand's twenty constitutions place it in genuinely rare company on the global stage.
The Dominican Republic in the Caribbean has the most constitutions — 32 since gaining independence in 1844. There are three other countries with 20 or more constitutions, all of them also in Latin America — Venezuela (26), Haiti (24) and Ecuador (20).
Thailand stands alongside that list as one of the only nations outside Latin America to reach the same staggering total. In the last 84 years, Thailand has experienced 19 coups and now its 20th constitution.
The King Who Signed Away Absolute Power in a Single Afternoon
Thailand's entire constitutional era began with a bloodless coup against a king who was not even in the city when it happened.
On June 24, 1932, while Prajadhipok was away from Bangkok, the Promoters staged a bloodless coup, seizing control of the army, imprisoning the royal officials who had constituted the ruling group, and persuading the king to agree to rule under a constitution.
The Promoters were not radicals looking to abolish royalty entirely. They were led by Pridi Phanomyong, a brilliant young lawyer studying in Paris. Within days, King Prajadhipok agreed to a codified constitution, signing a temporary charter on 27 June 1932 at 17:00, which began by announcing that "the highest power in the land belongs to all people."
An absolute monarchy that had ruled Siam for centuries ended with a single royal signature, on a specific afternoon, at a specific hour.
The Shortest Charter Ever — Twenty Articles That Allowed Summary Executions
Not every Thai constitution aimed to expand rights. Some were built for the opposite purpose entirely.
A temporary charter was promulgated in February 1959 and remained in place for nine years. The charter has been called "perhaps the most repressive in Thailand's history." It granted the premier near absolute power, including the authority to order summary executions. It banned political parties and called for an appointed unicameral parliament, consisting of 240 mostly military appointees. It contained only 20 articles, making it the shortest charter in Thai history.
Twenty articles. Nine years in force. The power to execute people without trial. It remains the starkest example in Thai history of how thin a "constitution" can be while still functioning as the supreme law of an entire nation.
The People's Charter — The One Constitution Thailand Actually Wrote Itself
Among twenty attempts, one stands out as fundamentally different from all the rest.
The 1997 constitution of Thailand, often called the "people's constitution," was considered a landmark in terms of the degree of public participation involved in its drafting as well as the democratic nature of its articles. It stipulated an elected bicameral legislature, and many human rights were explicitly acknowledged for the first time.
The charter of 1997 was the only one written by democratically elected drafters. It was praised for containing a lot of checks and balance mechanisms, including independent organisations and an elected Senate to scrutinise elected rulers.
Out of twenty constitutions, only one was genuinely written by the people it governed rather than handed down by a junta, a king's advisors, or an appointed committee. It lasted less than a decade before being torn up by another coup in 2006.
Forty-Four Dead in Three Days — The Constitution Bought With Blood
Thailand's constitutional crises have not always stayed peaceful on paper. On 23 February 1991, a military coup unseated the government of General Chatchai. Although elections were held in March 1992, General Suchinda refused to cede power. In response, 200,000 protesters gathered at the Democracy Monument on 17 May 1992. General Suchinda responded with violent military force. Between 17 and 20 May, 44 people were killed, 38 were missing, and more than 500 were injured.
This event became known across Thailand simply as "Black May." The violence ended after Generals Suchinda and Chamlong were both summoned by the King for a royal reproach, General Suchinda resigned, and new elections were announced.
It took a direct royal intervention — the King personally summoning both rival generals — to end one of the bloodiest constitutional crises in modern Thai history.
The Military's Newest Trick — Write the Senate Before You Write the Election Rules
The current 2017 constitution introduced a mechanism specifically engineered to outlast the junta that wrote it.
The new constitution empowers the military to select every one of the 250 members of the Thai senate; until now, the military had been appointing just under half of them.
By constitutionally guaranteeing total control over an entire chamber of parliament before a single election was even held, the 2017 charter ensured that whichever party won the popular vote would still have to govern alongside — or against — a Senate built entirely by the generals who staged the 2014 coup.
Constitution at a Glance
| Detail | Information |
|---|---|
| End of Absolute Monarchy | June 24, 1932 |
| First Constitution | 1932 |
| Total Constitutions/Charters | 20 |
| Military Coups Since 1932 | 13–19 (sources vary) |
| Shortest Charter | 1959 — 20 articles |
| Most Democratic Charter | 1997 — "People's Constitution" |
| Longest-Lasting Constitution | 1978 — 12 years, 2 months |
| Current Constitution | 2017 |
| Senate (2017 Charter) | 250 members, fully military-appointed |
| Government Type | Constitutional Monarchy (every version) |
📥 Read the Constitution of Thailand
Read the complete, official English text of the current Constitution of the Kingdom of Thailand:
👉 Read Constitution of Thailand — Official Constitutional Court Translation
Twenty constitutions in 92 years. A 20-article charter that allowed summary execution. Forty-four people killed defending the right to vote. Which part of Thailand's constitutional story surprised you the most? Tell us in the comments below.
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