A wiring member includes a plurality of wires and a holding member for holding the plurality of wires. The plurality of wires include a power line and a communication line that extend in the same direction. The holding member includes a plurality of wire holding portions that each can hold a wire at a fixed position. The power line is held by a first wire holding portion of the plurality of wire holding portions. The communication line is held by a second wire holding portion of the plurality of wire holding portions. At least one of the plurality of wire holding portions is formed to be capable of retrofittably holding the wire.