Thai Smile Bus

Thai Smile Bus (TSB)
Overview
Native nameไทยสมายล์บัส
OwnerMinistry of Transport
Transit typePublic transit buses within the Greater Bangkok area
Number of lines125 routes
Daily ridership380,000
Key peopleKulpornphat Wongmajarapinya
Websitethaismilegroup.com

Thai Smile Bus (Thai: บริษัทไทยสมายล์บัสจำกัด) is a major private bus operator in Bangkok and its surrounding provinces that provides bus service under a concession issued by the Thai Ministry of Transport.

Since it launched service in 2022, Thai Smile Bus has progressively taken over bus routes in the Bangkok Metropolitan Region from other providers, including the public operator, Bangkok Mass Transit Authority. Fares start from 15 baht, with the entire fleet consisting of EV buses, aimed at reducing carbon emissions. As of 2025, TSB runs 123 bus routes in Bangkok and the surrounding provinces as part of a plan to reform bus operations in and around Bangkok.

The company also operates electric ferries along the Chao Phraya River and Khlong Saen Saeb in Bangkok branded as Thai Smile Boat.

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