Abstract: A vehicular lamp and injection mold and manufacturing method for lamp bodies for producing a plurality of different types of vehicular lamps while resulting in a reduced cost of manufacturing due to sharing of a common injection mold. A lamp body of a tail lamp, for example, includes a reflective surface for reflecting light from a light source bulb forward and is formed with a bulb attachment hole for mounting the light source bulb constituted by an insert-molded surface. That is, part of a reflective surface of the lamp body is formed by an insert-molded surface molded with a cavity surface of an insert constituting a part of a fixed mold of an injection mold. To change to molding a different type of lamp body, it is only necessary to change the insert.

Abstract: A vehicular lamp and injection mold and manufacturing method for lamp bodies for producing a plurality of different types of vehicular lamps while resulting in a reduced cost of manufacturing due to sharing of a common injection mold. A lamp body of a tail lamp, for example, includes a reflective surface for reflecting light from a light source bulb forward and is formed with a bulb attachment hole for mounting the light source bulb constituted by an insert-molded surface. That is, part of a reflective surface of the lamp body is formed by an insert-molded surface molded with a cavity surface of an insert constituting a part of a fixed mold of an injection mold. To change to molding a different type of lamp body, it is only necessary to change the insert.