Generally, a foreign citizen who wishes to enter the Kingdom of Thailand is required to obtain a visa from a Royal Thai Embassy or a Royal Thai Consulate-General. Nationals from most countries are not required to have a visa when entering Thailand for tourism purposes. Such nationals will be permitted to stay in the Kingdom of Thailand for a period of not exceeding 30 days.
Check the list below to see the countries and territories entitled for visa exemption and visa on arrival to Thailand who will be entitled to stay not exceeding to 15 up to 90 days.
For more information, please see Ministry of Foreign Affairs of Kingdom of Thailand.
Please check the details about visa requirements on Immigration Department's website: http://www.mfa.go.th/main/en/services/123/15398-Issuance- of-Visa.htm