Abstract: The present invention provides an improved structure for compact disk cases comprising a hollow rectangular case body having a fully open top portion, a disk holder placed in the case body, and a cover plate covering the case body, the left and right sidewalls of the case body being each provided at the lower section with a groove extending from the front to the rear, and the bottom ends of the left and right sidewalls of the cover plate being each formed inwardly with an integral guide rail for the cover plate to slip-fit with the case body such that when both are closed together, the stop strip on the front side of the cover plate snaps into the arcuate ducts in the front end of the disk holder, and in use, by properly applying force, the cover plate will be slid backward to position, thus resulting in smooth and positive sliding to open and close for the structure as a whole.