Train to Busan (Korean: 부산행; RR: Busanhaeng; MR: Pusanhaeng; lit. To Busan) is a 2016 South Korean action horror film directed by Yeon Sang-ho, written by Park Joo-suk, and starring Gong Yoo, Jung Yu-mi, Ma Dong-seok, Kim Su-an, Choi Woo-shik, Ahn So-hee, and Kim Eui-sung. The film mostly takes place on a KTX from Seoul to Busan as a zombie apocalypse suddenly breaks out in the country and threatens the safety of the engers.

The film premiered in the Midnight Screenings section of the 2016 Cannes Film Festival on 13 May. On 7 August, the film set a record as the first Korean film of 2016 to break the audience record of over 10 million theatergoers.

The movie successfully launched the Train to Busan film series, with the animated prequel Seoul Station released in 2016 and a standalone sequel named Peninsula released in 2020. Another installment and an American-produced adaptation are also in development.