Provided is an optical disk drive adapter comprising: a first rotating portion disposed at the center of an optical disk drive and installing a turntable on which a standard optical disk is mounted; a second rotating portion disposed beside the first rotating portion and installing a turntable on which a subminiature optical disk is mounted; a force transmitting portion disposed between the first rotating portion and the second rotating portion and transmitting a rotary force between the first rotating portion and the second rotating portion; and a housing supporting the entire optical disk drive adapter so that the first rotating portion, the second rotating portion, and the force transmitting portions can be rotated on their axes while maintaining their overall shape. Accordingly, without an additional subminiature optical disk drive, a subminiature optical disk can be driven using a conventional standard optical disk drive.