Infinite Challenge (Korean: 무한도전; Hanja: 無限挑戰; RR: Muhan Dojeon; abbreviated as Korean: 무도; Hanja: 無挑; RR: Mudo) is a South Korean comedic reality television show that aired on MBC TV from 2005 to 2018. The show was produced by Kim Tae-ho, and starred various entertainers, including Yoo Jae-suk, Park Myung-soo, Jeong Jun-ha, Haha, Jung Hyung-don, Noh Hong-chul, Jun Jin, Yang Se-hyung, Hwang Kwang-hee, Gill, and Jo Se-ho.

Infinite Challenge was marketed as "Korea's first reality-variety show", combining the humorous games of Korean variety shows with the intimate filming style of reality television. Each episode features cast members competing in challenges, including physical competitions and song contests.

Often called "the nation's variety show", Infinite Challenge was consistently popular in South Korea during its 13-year run. In 2008, the show reached its viewership peak, with nearly 30 percent of South Korean television viewers watching the program. The show was voted the country's favorite television program in both 2015 and 2016, according to polls conducted by Gallup Korea. Additionally, the show's song contests, which paired cast members with popular musical artists, spawned multiple top ten hits on the Gaon Digital Chart throughout the 2010s.