Section 299: Affray causing grievous harm
Statutory text (Thai original)
ผู้ใดเข้าร่วมในการชุลมุนต่อสู้ระหว่างบุคคลแต่สามคนขึ้นไป และบุคคลหนึ่งบุคคลใดไม่ว่าจะเป็นผู้ที่เข้าร่วมในการนั้นหรือไม่รับอันตรายสาหัส โดยการกระทำในการชุลมุนต่อสู้นั้น ต้องระวางโทษจำคุกไม่เกินหนึ่งปี หรือปรับไม่เกินสองหมื่นบาท หรือทั้งจำทั้งปรับ ถ้าผู้ที่เข้าร่วมในการชุลมุนต่อสู้นั้นแสดงได้ว่า ได้กระทำไปเพื่อห้ามการชุลมุนต่อสู้นั้น หรือเพื่อป้องกันโดยชอบด้วยกฎหมาย ผู้นั้นไม่ต้องรับโทษ หมายเหตุ: [อัตราโทษ แก้ไขเพิ่มเติมโดยมาตรา ๔ แห่งพระราชบัญญัติแก้ไขเพิ่มเติมประมวลกฎหมายอาญา (ฉบับที่ ๒๖) พ.ศ. ๒๕๖๐]
English translation
Whoever takes part in an affray between three or more persons, and any person, whether or not taking part in it, suffers grievous bodily harm as a result of an act done in that affray, shall be liable to imprisonment not exceeding one year, or a fine not exceeding twenty thousand baht, or both.
A person taking part in the affray who shows that he acted in order to stop the affray, or in lawful defence, is not punished.
ThaiLawOnline translation, written from the Thai original and verified
Firm annotation
The elements mirror Section 294, taking part in an affray among three or more persons, but the qualifying result is grievous bodily harm rather than death, and the penalty is correspondingly lighter, a one-year maximum. Like Section 294, it applies where it cannot be shown who caused the harm in a confused melee, so liability rests on participation. The two sections are routinely charged together where an affray produces both a death and a grievous injury. Where the fight is instead a consensual clash between identifiable sides, the affray offence does not apply.
Why this matters in practice
Exposure is modest, up to one year, and the state need not identify who inflicted the grievous harm; participation in the affray plus a resulting serious injury suffices. The strongest defence is that there was no confused melee at all but a two-sided fight between identifiable groups, which the courts have held falls outside the section. As with Section 294, this charge commonly travels with firearms and public-order offences from the same incident.
Supreme Court decisions interpreting this section
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Supreme Court Judgment No. 3610/2562 (2019)
The affray offence requires three or more persons fighting in a confused melee where it is unknown who inflicted the harm; where two identified sides willingly fight each other, the offence under this section does not apply.
Because the defendant 1 group on one side and the defendant 2 group on the other willingly fought each other, whether or not a melee resulted, the court held that defendant 2's act was not the affray offence.
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Supreme Court Judgment No. 921/2562 (2019)
A person who joins an affray among three or more people is guilty where a participant or bystander is grievously injured or killed in the melee, even where the accused denies involvement but admits presence at the scene.
Defendants who denied the charge but admitted being at the scene were held guilty of joining an affray of three or more persons that caused a death and grievous injury, and the conviction was sustained under Criminal Procedure Code Section 192 paragraph 3.
Curated decisions with case numbers verified against the Supreme Court database. English renderings are the firm's editorial translation for study.
Cited in 32 Supreme Court decisions (1959 to 2019)
Selected citing decisions
- Decision 14232/2558 (2015)
- Decision 5129/2554 (2011)
- Decision 7235/2553 (2010)
- Decision 1481/2548 (2005)
- Decision 6022/2539 (1996)
- Decision 7945/2538 (1995)
- Decision 4936/2537 (1994)
- Decision 1229/2532 (1989)
This list is selected automatically, weighted towards judgments that turn on this section rather than ones that merely recite it when passing sentence. It has not yet been reviewed by the firm.
Most often cited alongside
- Section 83 22
- Section 297 15
- Section 288 14
- Section 80 13
- Section 91 10
- Section 90 10
Sections that appear in the same judgments as this one most often. The figure is the number of decisions.
Counted across the firm's corpus of 83,652 Supreme Court decisions, 1921 to 2026. The count is complete; the stated year range trims rare outliers so it describes where the citations actually sit. These figures are computed by us and are not official court statistics. How we count these, and what we measured
Frequently asked questions
How is Section 299 different from Section 294?
Both punish taking part in an affray of three or more people, but Section 294 applies where someone dies and Section 299 where someone suffers grievous bodily harm, with a lighter one-year maximum.
Does Section 299 apply to a fight between two identifiable groups?
No. Where two identified sides willingly fight each other, the courts have held the affray offence does not apply, because the section targets a confused melee in which the person who caused the harm is unknown.
Related guides on ThaiLawOnline
Cite this section
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Plain citation
Penal Code, s. 299 (Thailand) -
Academic citation
Penal Code (Thailand), s. 299. ThaiLawOnline, https://www.thailawonline.com/thai-penal-code/section-299/ (accessed 17 August 2026). -
Thai citation
ป.อ. มาตรา 299 -
Permalink
https://www.thailawonline.com/thai-penal-code/section-299/ -
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<blockquote cite="https://www.thailawonline.com/thai-penal-code/section-299/"><p>Whoever takes part in an affray between three or more persons, and any person, whether or not taking part in it, suffers grievous bodily harm as a result of an act done in that affray, shall be liable to imprisonment not exceeding one year, or…</p><footer>Penal Code, s. 299 (Thailand) — <a href="https://www.thailawonline.com/thai-penal-code/section-299/">ThaiLawOnline</a></footer></blockquote>
The Thai text is authoritative. The English is an unofficial translation by ThaiLawOnline, free to reuse with attribution.