Abstract: A new small sized tag cover for a compact disk to prevent shoplifting is developed. The shoplifting prevention tag is not easily damaged or removed from the compact disk housing case. Therefore, the compact disk is prevented from being stolen. The shoplifting prevention tag is recycled for subsequent use. The tag cover is comprised of a first connecting portion having a first engagement piece to be inserted into a first groove of a lid portion of the compact disk housing case. A second connecting portion having a second engagement piece is provided to be inserted into a second groove of the lid portion. A connecting portion is provided to retain the housing case in closed condition by clamping the housing case together with the first and second engagement pieces. A locking mechanism is provided to retain the lid portion in a closed condition.