No Brain is an influential Korean punk rock band widely considered one of the godfathers of the Korean punk scene. Originally part of Korea's homegrown underground punk movement, known as Chosun Punk, in recent years the group has enjoyed mainstream success both with their music and their emerging acting and hosting careers. Their name comes from their desire for concert-goers to leave their rational minds at the venue doors.

No Brain have played more than 3000 shows over the last 15 years, with their listeners ranging from the general public including to youngsters who associate themselves with the western punk-rock scene. Though they have enjoyed moderate success, No Brain still play in small-sized venues as they did in the beginning of their career.