A light-emitting accessory including: a light source; a light guide body that guides the light radiated from the light source; a case body that holds the light source and the light guide body and has an attachment to an outside thereof; a cover body formed by a light permeable material and being attached to the case body to cover the light source and the light guide body. The light guide body has a back surface facing the light source, and a front surface opposite to the back surface. In the vicinity of the center of the front surface is made an inclined portion which is inclined in a direction of thickness of the light guide body, and the light source confronts the inclined portion.