An information storage disk handling apparatus includes a first disk device, a second disk device and a turn-over device. The first disk device has a first tray, and the second disk device has a second tray. The first disk device is mounted over the second disk device. Each of the trays has an ejected position. The turn-over device is mounted between the ejected positions of the trays of the first disk device and the second disk device to turn over an optical disk removed from the first tray at its ejected position and received by the second tray at its ejected position after the optical disk is turned.