Abstract text

There is provided an optical information recording/reproducing apparatus having an optical disc drive unit for driving an optical disc mounted, a hologram disc drive unit for driving a hologram disc mounted, a disk discrimination device for discriminating which of an optical disc and a hologram disc was mounted, a selection device of the disk drive unit for selecting an optical disc drive unit, when discriminated to be an optical disc, by the disk discrimination device, while selecting a hologram disc drive unit, when discriminated to be a hologram disc, by the disk discrimination device, and a drive device of the disk drive unit for driving the disk drive unit selected by the selection device of the disk drive unit.