WIRE-HARNESS WIRING STRUCTURE

Provided is a wire harness installing structure, such that workability upon installing a wire harness can be improved, and space to be used by the installation area can be saved. The wire harness installing structure (1) has a wire harness (5), which includes a cylindrical protection sheath (23) that holds a plurality of wires (21) in a bundled state, wired across two structures, by making the wire harness (5) stride over a movable linking part that links the two structures in a pivotable state. A movable part wiring section (25) of the wire harness (5), which is to be installed for a prescribed length section that strides over the movable linking part, includes a non bundled part (26) in which the protection sheath (23) is peeled off to make each of the wires (21) therein movable; and a stretchable protective member (27) that covers the outer circumference of the non bundled part (26) so as not to restrict a movable state of each of the wires (21).