Disk guide device with turnable guide lever

A disk guide device for use with different diameter disks is disclosed. The disk guide device may include a transporting roller for transporting a disk to a chucking position, a pair of detection arms capable of abutting with a periphery of an inserted disk, a biasing member that urges the detection arms in a closing direction, a guide lever have a stopper part an turnable around an axis that is parallel to a face of the inserted disk and perpendicular to a transport direction of the disk; a stopper retreating mechanism which turns the guide lever, and a lock part for maintaining the guide lever in a state where the stopper part is protruded in the disk playing space.