A support member-attached wiring member includes: a wiring member flatly formed; a support member including a fitting part formed into a cylindrical shape opening in one portion in a circumferential direction so as to be able to be fitted to an outer peripheral part of a rod-like member; a penetration part passing through the wiring member in a state where the wiring member is disposed on an outer side of the support member; and a retaining part which does not pass through the wiring member but is provided on an outer side of the wiring member to prevent the penetration part from coming out of the wiring member.