A disc device includes a cabinet having a tray ejection/inserting opening; a disc tray being ejected from and inserted into the tray ejecting/inserting opening of the cabinet; a tray cover being capable of opening and closing the tray ejecting/inserting opening of the cabinet; and an engaging unit that engages the disc tray with the tray cover at an opening position when the disc tray is inserted to thereby pull in and close the tray cover from the opening position. The tray cover is pushed out and opened from a closing position by the disc tray when the disc tray is ejected. The engaging unit holds the disc tray and the tray cover engaged with each other when the disc tray is received in the cabinet to thereby prevent the tray cover from being opened.