A clutch unit that is used for a vehicle seat includes: a housing, which accommodates at least one of a input-side clutch and a output-side clutch, a first engaging portion, which is rotatable integrally with an output shaft member, and a lock member, which is able to be shifted between a locked state, in which the rotation of the output shaft member relative to the housing is suppressed by the lock member being locked to the first engaging portion, and an unlocked state, in which the rotation of the output shaft member relative to the housing is allowed by releasing the engaging with the first engaging portion, wherein when the lock member is shifted from the locked state to the unlocked state, the lock member is elastically deformed to release the engagement of the lock member and the first engaging portion.