A door wiring module includes a door functional planar member and a wiring member. The door functional planar member is incorporated between a door panel and a design trim in a door of a vehicle. The wiring member is wired on a planar part of a main surface of the door functional planar member where a groove is not formed, and fixed to the door functional planar member.

A door wiring module includes a door functional planar member and a wiring member. The door functional planar member is incorporated between a door panel and a design trim in a door of a vehicle. The wiring member is wired on a planar part of a main surface of the door functional planar member where a groove is not formed, and fixed to the door functional planar member.

An object is to provide a wire to be used as a wiring member that can be easily and securely fixed to another member. A flat wire includes a flat conductor cover portion that covers the flat conductor with a flat shape and has a main surface on at least one side that exhibits self bonding properties. The main surface on at least one side of the cover portion exhibits self clinging properties. A flat wire multilayer body is manufactured by a plurality of flat wires being overlaid in each other in a state in which the main surfaces that exhibit self bonding properties of each of the cover portions are bonded together.