A wire harness routing method is provided. A wire harness is routed on a protector base. A protective tape is wound around an outer periphery of the wire harness at a position outside an end portion of the protector base in a longitudinal direction. A cover is put on the protector base under the above state. The wire harness is fixed to, by winding a binding band at a position where the tape is wound, a wire harness-fixed protruding piece protruding outward in the longitudinal direction from an end portion of the cover in the longitudinal direction.