Infinite Challenge (Korean: 무한도전; Hanja: 無限挑戰; RR: Muhan Dojeon; abbreviated as Korean: 무도; Hanja: 無挑; RR: Mudo) was a South Korean television entertainment program, distributed and syndicated by MBC, that ran from 2005 to 2018.

As of January 2013, it had the largest market share for its timeslot; with between 13 and 17 percent of Korean television viewers watching Infinite Challenge every Saturday night. making it the most-watched free-to-air television program on Saturday evenings, and the most viewed non-drama program in South Korea every week (excluding special sporting events, since November 2006, with the exception of January 2009, April and May 2010).

"Infinite Challenge" began airing in 2005 and ended with 563 episodes on March 31, 2018. Infinite Challenge was also listed on the longest variety show. Since 2009, it lasts for roughly 75 minutes, excluding ten minutes of advertising. Episodes are also frequently rerun on several Korean cable broadcasting channels. Since February 19, 2011 (episode 237), the program has been aired in high-definition. Infinite Challenge has been called "the nation's variety show" and "Korea's real first variety" for having been successful for over ten years.

In March 2018, it was announced that, following the departure of lead producer Kim Tae-ho, all current members have stepped down from the show, bringing the program to an end. The last episode was aired on March 31, 2018, but the program continued for 3 more weeks with a recap special looking back at the program over the years.