There is provided a disc player which can be reduced in the number of parts and in cost, and which can be designed to be thin and provided with a function of sufficiently self-holding a lock state.A drive unit 9 is constructed by a base plate 13 and a swing plate 17 for pinching a disc in cooperation with the base plate 13, and a lock mechanism 260 is disposed between the base plate 13 and the swing plate 17, and the operation of the lock mechanism 260 is interlocked with the operation of the swing plate 17.