A disk accommodating unit accommodates a plurality of disk trays for holding a disk. A disk processing unit reproduces data from or records data to a loaded disk. A loading mechanism loads a selected disk together with the disk tray from the disk accommodating unit to a position of the disk processing unit. The loading mechanism includes a tray drawing pinion provided in the disk processing unit; a disk tray that includes a tray rack engaged with the tray drawing pinion; and a rack plate that includes a tray drawing rack engaged with the tray drawing pinion, and draws a tray in at a first half process of the loading and stops the tray at a second half process of the loading.