A disc device records or reproduces information in or from a disc stored in a disc cartridge. The disc cartridge includes a casing having a front face with an opening for receiving the disc; and a cover closing the opening of the casing. The cover includes a slider moving along a side face of the casing, a shutter closing the opening; and a hinge part rotatably coupling the shutter to the slider. The disc device includes a stopper contacting the slider when the disc cartridge is inserted into the disc device to restrict movement of the slider in an insertion direction, and a cam part separating the hinge part from a contact region between the shutter and the casing when or before the casing further moves with the stopper restricting movement of the slider and the shutter is pressed by the casing to rotate about the hinge part.