A decorative button (1) includes a base member (10) and a cap member (14). The base member (10) includes a prong-accommodating portion (11) that receives a prong portion (21) of a fixing member (2). The cap member (14) is disposed on the base member (10) and forms an outer surface of the decorative button (1). The base member (10) is provided with a cap-supporting portion (13) which abuts to a middle portion of a rear surface of the cap member (14) to support the cap member (14), thereby preventing a deformation of the cap member (14). A top portion (13') of the cap-supporting portion (13) is a plane to abut to the rear surface of the cap member (14) along the curving of the rear surface.