A disc device including a disc driving section, a transport roller, a positioning member, a detection section, a transmitting member for transmitting movement of the detection section to the positioning member, a roller supporting member for moving the transport roller to a transport position where the transport roller is capable of transporting a disc and to a retreat position where the transport roller is separated from the disc, and a restraining section disposed at the roller supporting member. When the transport roller moves to the retreat position, the detection section is restrained by being moved in a predetermined direction by the restraining section and the movement of the detection section when restraining the detection section is transmitted to the positioning member through the transmitting member, so that the positioning member moves so as to separate from the outer peripheral edge of the disc.