Taiwan Taoyuan International Airport MRT, commonly known as the Airport MRT, is a rapid transit line of the Taoyuan Metro that connects the municipalities of the capital Taipei, Taoyuan and New Taipei with Taoyuan International Airport. The 51.33 km (31.89 mi) line, from Taipei Main Station to Laojie River, has 22 stations and began commercial service on 2 March 2017.

The Taoyuan Metro is a rapid transit system serving Taoyuan City, as well as parts of New Taipei City and Taipei City, in Taiwan. The most recently proposed network includes 11 lines and extensions, of which 2 are now under construction. The Taoyuan Airport MRT is the only line currently in operation. The system opened with the opening of the first line in the system, Taoyuan Airport MRT, for trial passenger service on 2 February 2017 and revenue passenger service on 2 March 2017.