Abstract: An electronic apparatus includes an exterior casing; an accommodating section in the exterior casing and operable to detachably accommodate a disk-shaped recording medium; a recording/reproducing section operable to record data to and/or reproduce data from the disk-shaped recording medium accommodated in the accommodating section; an open/close cover on the exterior casing movable between a closed position for covering the accommodating section and an open position for uncovering the accommodating section; a lock mechanism operable to produce a locked state in which the cover is held in the closed position and an unlocked state in which the cover can move from the closed position to the open position; and an arm provided on an inside surface of the cover and extending through a center of the cover to a mutually facing position at an outer circumference of the cover.