A bus bar attaching member 1 forming a room lamp 10 for a vehicle includes a housing 2 and a plurality of bus bars 3a, 3b, 3h and 3i insert molded in the housing 2. Further, in wiring parts 5 of the bus bars 3a and 3b, impact absorbing parts 6a and 6b are provided that prevent an impact when an electric wire 8 is pressed in contact with pressure contact parts 4 from being transmitted to parts attaching parts 7. The impact absorbing parts 6a and 6b are configured in U shaped forms by first absorbing parts 61a and 61b extending in the directions intersecting virtual straight lines K1 and K2 that connect bottom walls 40 of the pressure contact parts 4 to the parts attaching parts 7, second absorbing parts 62a and 62b and third absorbing parts 63a and 63b.