Abstract: A sliding member slides in response to a disk cartridge being inserted into a holder. The holder moves, as a result of the sliding of the sliding member, from a disk cartridge insertion/ejection position at which the disk cartridge is inserted into the holder to a disk cartridge loading position at which the disk cartridge is loaded. A rotation member is rotatably provided within a sliding range of the sliding member. A force applying member is also provided within the sliding range of the sliding member, one end of the force applying member is held by the sliding member and the other end of the force applying member is held by the rotation member. The force applying member applies a force to the sliding member in a direction opposite to a direction along which the sliding member is sliding at the beginning of movement of the holder from the disk cartridge insertion/ejection position to the loading position.