A data disk holder for electronic data storage disks such as compact disks (CDs), includes two opposed, generally arcuate planar closure members which are joined together along a base portion by a living hinge. One of the closure members includes a circular flange defining a bore for receiving a boss projecting centrally from the disk support surface of the other closure member, the boss being an interference fit in the bore for securing the closure members together to retain a data disk in the holder. The holder may be injection molded of relatively light weight polypropylene or a similar moldable polymer and may include transverse walls and a double living hinge to provide the jewel box construction and thickness of conventional disk holders.