Storage cassette structure for floppy compact disk

A low-profile compact disk (CD) case includes pivotally connected top cover and bottom seat to provide an inner space for receiving a compact disk therein. The bottom seat is integrally formed on an inner surface with a central holding means and a plurality of protective means. The central holding means is a short hollow cylinder upward projected from the bottom seat and has spaced cuts along its circumferential wall to provide a plurality of flexible catch pawls for holding a compact disk in place. First and second protective means are low-raised ribs for supporting and preventing the compact disk from direct contact with the bottom seat, and the third protective means are raised curved ribs higher than the first and the second ribs and the compact disk for protecting the compact disk from compression by the top cover. No extra CD deck is required and an overall height or thickness and production costs of the CD case can therefore be largely reduced.