Patent ID: 8262084

Claim:
A sheet feeding apparatus provided with a sheet feeding cassette detachably mounted on a main body of an apparatus, and a feed roller for feeding a sheet stacked on said sheet feeding cassette, said sheet feeding apparatus comprising: a holding portion provided in the main body of the apparatus, having said feed roller rotatably supported on said holding portion, and detachably holding said feed roller; and a locking member movable to a lock position for restricting a detachment of said feed roller, and a lock releasing position for permitting the detachment of said feed roller, wherein when said sheet feeding cassette is mounted to the main body, said locking member is located in a position that is not pushed by said sheet feeding cassette at the lock position and is located in a position that is pushed by said sheet feeding cassette at the lock releasing position, wherein the locking member is pivotally moved between the lock position and the lock releasing position, and when said locking member is in the lock releasing position with said sheet feeding cassette drawn out from the main body of the apparatus, said locking member is moved to the lock position by being pushed by said sheet feeding cassette in association with a mounting operation of said sheet feeding cassette.