Abstract: A cover for a cosmetic product packaging device, suitable for attachment to a packaging casing, which comprises: a hollow body, the hollow body comprising first snap-fit reliefs; and a decorative part comprising at least one face intended to be oriented away from the packaging casing and having a decoration, and second snap-fit reliefs. The decorative part is fixed to the hollow body so as to close off an opening of the hollow body, by snap-fitting of the first and second snap-fit reliefs. The snap-fitting of the first and second snap-fit reliefs can be disassembled without damaging the hollow body or the decorative part.