Marathon (Hangul: 말아톤; RR: Maraton) is a 2005 South Korean film directed by Jeong Yoon-cheol, and starring Jo Seung-woo, Kim Mi-sook and Lee Ki-young. It received 5,148,022 admissions, making it the 4th most attended Korean film of 2005.
Based on the true story of Bae Hyeong-jin, an autistic marathon runner, the film popularized the South Korean term for autism (Hangul: 자폐증; RR: japyejeung) which can be translated as "self-closed syndrome."