Travel
Laws and prohibitions every visitor to Thailand should know
Last reviewed: 2026-07-18
Written by Ricardo Dos Santos
A few Thai laws surprise visitors because they differ sharply from home — vaping, criticism of the monarchy and drug laws carry real legal risk. Here is what to know before you travel, and why you should always verify current rules.
Vaping and e-cigarettes: illegal, not a grey area
Importing, possessing, using or selling e-cigarettes and vaping devices has been illegal in Thailand since 2014. This is not loosely enforced everywhere: reported fines range from a few thousand to tens of thousands of baht depending on the circumstances, and enforcement has visibly tightened in 2025–2026, with importation carrying a real risk of criminal prosecution. There is no tourist exception — leave vaping devices at home.
Criticising the monarchy is a serious criminal offence
Thailand's lèse-majesté law (Section 112 of the Criminal Code) makes it a criminal offence to defame, insult or threaten the King, Queen, heir-apparent or regent, in speech or online. Penalties are severe — up to 15 years per offence — and the law is actively enforced, including against foreign visitors. The safest approach is simple: avoid any commentary on the Thai monarchy, in person or on social media, during your stay.
Cannabis and drugs: verify before you travel
Thailand's cannabis regulations have changed more than once in recent years and remain a genuinely moving target. Do not rely on outdated articles or word of mouth. Whatever the current cannabis status, all other recreational drugs remain strictly illegal with severe penalties, including for possession of small amounts. If in doubt, treat any drug as illegal and check the current official position before travelling.
Tobacco
Smoking is legal but restricted: many public places require smoking in designated zones only, and several provinces ban smoking on specific public beaches. Fines apply for smoking outside permitted areas.
Sex toys and "obscene objects"
The sale, promotion and possession of items classified as obscene are prohibited under Section 287 of the Thai Criminal Code, with penalties that can include prison time or a fine — though real-world enforcement is inconsistent. It is safest not to pack or purchase such items during your trip.
Rules change — always double-check
Every rule above can change, and enforcement intensity varies by period and location. Before travelling, check your embassy's Thailand travel advice and, for anything time-sensitive, an official Thai government source.