A library apparatus includes a shutter mechanism including a slide-type shutter configured to open and close the opening and an urging member configured to urge the shutter in a closing direction, and a first locking mechanism configured such that when the running body is stopped at a passing and receiving position of the cartridge, the first locking mechanism permits the shutter in a fully closed state to slide in an opening direction and enables a fully open state of the shutter to be maintained, whereas when the running body is not stopped at the passing and receiving position of the cartridge, the first locking mechanism releases the maintenance of the fully open state of the shutter and prohibits the shutter in the fully closed state from sliding in the opening direction.