Abstract: A locking device for releasable securing a compact disc to a disc seat provided in a compact disc case. The device has a flat base, a raised circular shoulder located on the base, and a raised button located on the top of the circular shoulder. The device inserts between the bottom of the case and the disc seat so that the base rests against the bottom of the case, the circular shoulder of the device removable inserts into the middle of the central retaining ring, and the button extends upward through the center opening of the central retaining ring. Although a compact disc can be inserted onto the disc seat without the user manually depressing the button, a compact disc can only be removed for the retaining disk seat by first depressing the button.