PURPOSE: To obtain a multi-disk changer capable of executing the change of disk cassettes with two action such as the take-out of a prescribed disk cassette and the loading of a new disk.

CONSTITUTION: The disk changer has plural eject keys 3 provided so as to corresponding to respective inserting ports 2 of an optical disk cassette 1 and an eject device 21 ejecting the optical disk cassette 1 specified by the eject key to the outside of a disk housing part 5.