Section 329: Good faith defences to defamation
Statutory text (Thai original)
ผู้ใดแสดงความคิดเห็นหรือข้อความใดโดยสุจริต (๑) เพื่อความชอบธรรม ป้องกันตนหรือป้องกันส่วนได้เสียเกี่ยวกับตนตามคลองธรรม (๒) ในฐานะเป็นเจ้าพนักงานปฏิบัติการตามหน้าที่ (๓) ติชมด้วยความเป็นธรรม ซึ่งบุคคลหรือสิ่งใดอันเป็นวิสัยของประชาชนย่อมกระทำ หรือ (๔) ในการแจ้งข่าวด้วยความเป็นธรรมเรื่องการดำเนินการอันเปิดเผยในศาลหรือในการประชุม ผู้นั้นไม่มีความผิดฐานหมิ่นประมาท
English translation
Whoever, in good faith, expresses an opinion or a statement:
(1) by way of self-justification or self-defence, or to protect a legitimate interest of his own according to righteousness;
(2) in the capacity of an official in the performance of his duties;
(3) by way of fair comment on a person or a thing which is open to public criticism; or
(4) by way of fair report of proceedings openly conducted in a court or at a meeting,is not guilty of defamation.
ThaiLawOnline translation, written from the Thai original and verified
Firm annotation
Section 329 sets out the good-faith exemptions that negate criminal defamation. The gateway requirement for all four grounds is that the opinion or statement is expressed in good faith. The grounds are: (1) self-justification, self-defence or protection of one's own legitimate interest according to righteousness; (2) an official acting in the exercise of duties; (3) fair comment on a person or thing that is a proper subject of public criticism; and (4) fair reporting of proceedings openly conducted in court or a meeting. These are exemptions rather than a truth defence, which is dealt with separately in Section 330. Good faith is the decisive issue in most cases: where the evidence shows an intent to shame or attack rather than a genuine opinion for a legitimate purpose, the exemption fails.
Why this matters in practice
Section 329 is the most important defence line in Thai defamation practice: it is what turns a technically defamatory statement into a lawful one. The burden effectively centres on good faith, so building evidence of a legitimate purpose, a factual basis, and proportionate wording is essential. Fair comment on public figures and matters of public interest under (3) is a frequent and successful defence, but it collapses where the court finds an intent to humiliate. Because it is a complete exemption, a well-founded Section 329 defence leads to acquittal rather than mere mitigation. See defamation defences in Supreme Court decisions for how the courts apply these grounds.
Supreme Court decisions interpreting this section
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Supreme Court Judgment No. 406/2567 (2024)
Where the prosecution cannot prove defamatory intent, and the statement is an honest, fair comment on a matter of public concern of the kind ordinary people would make, it is protected under Section 329(3) and is not defamation.
The complainant was a senior official. The Supreme Court held the court should not use the defendant's own evidence against him where the prosecution had not discharged its burden, and found the words a good-faith fair comment under Section 329(3), reversing the conviction and dismissing the case.
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Supreme Court Judgment No. 321/2568 (2025)
The Section 329(1) and (3) good-faith exemptions do not apply where the accused could have addressed the grievance through lawful legal process, and instead chose a public method of defamation.
The defendant argued the public banners were good-faith fair comment and self-protection under Section 329(1) and (3). The Court rejected this because, if the defendant believed the complainant's conduct unlawful, lawful legal remedies were available.
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Supreme Court Judgment No. 418/2567 (2024)
Where the evidence shows an intent to expose the complainant to public shame rather than a genuine good-faith opinion for a legitimate purpose, the accused cannot rely on the Section 329(1) exemption.
The Court found the defendant intended to publicly shame the plaintiff, which is an imputation likely to damage reputation, and rejected the claim of a good-faith opinion for a legitimate purpose under Section 329(1); the defamation conviction was upheld.
Curated decisions with case numbers verified against the Supreme Court database. English renderings are the firm's editorial translation for study.
Cited in 97 Supreme Court decisions (1960 to 2025)
Selected citing decisions
- Decision 321/2568 (2025)
- Decision 7256/2567 (2024)
- Decision 418/2567 (2024)
- Decision 406/2567 (2024)
- Decision 655/2567 (2024)
- Decision 1861/2561 (2018)
- Decision 11119/2558 (2015)
- Decision 5602-5604/2555 (2012)
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 326 35
- Section 328 30
- Section 29 13
- Section 30 13
- Section 83 13
- Section 332 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
What are the defences to defamation in Thailand?
Section 329 exempts a good-faith opinion or statement made for self-justification or to protect a legitimate interest, by an official on duty, as fair comment on a matter open to public criticism, or as a fair report of open court or meeting proceedings.
Can I criticise a public figure without committing defamation?
Yes, if it is fair comment made in good faith on a matter open to public criticism under Section 329(3). The exemption fails if the court finds the real intent was to shame or humiliate rather than to comment.
Related guides on ThaiLawOnline
Cite this section
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Plain citation
Penal Code, s. 329 (Thailand) -
Academic citation
Penal Code (Thailand), s. 329. ThaiLawOnline, https://www.thailawonline.com/thai-penal-code/section-329/ (accessed 17 August 2026). -
Thai citation
ป.อ. มาตรา 329 -
Permalink
https://www.thailawonline.com/thai-penal-code/section-329/ -
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<blockquote cite="https://www.thailawonline.com/thai-penal-code/section-329/"><p>Whoever, in good faith, expresses an opinion or a statement: (1) by way of self-justification or self-defence, or to protect a legitimate interest of his own according to righteousness; (2) in the capacity of an official in the performance of his duties; (3) by way…</p><footer>Penal Code, s. 329 (Thailand) — <a href="https://www.thailawonline.com/thai-penal-code/section-329/">ThaiLawOnline</a></footer></blockquote>
The Thai text is authoritative. The English is an unofficial translation by ThaiLawOnline, free to reuse with attribution.