An apparatus includes: a main body; a moving member movable between an accommodation position and a separation position; a driving member rotatably provided in the main body; a passive member rotatably provided in the moving member and is opposed to the driving member in a rotation axis direction; and a driving force transmitting member provided between the driving member and the passive member. The driving force transmitting member is movably supported in the driving member along the rotation axis direction, a first connecting unit is engaged with the driving member and the driving force transmitting member by an unevenness so as to be movable in a first diameter direction, and a second connecting unit is engaged with the driving force transmitting member and the passive member by an unevenness so as to be movable in a second diameter direction.