A harness routing structure includes: a supporting portion; a link pivotally supported by the supporting portion; and a harness protector provided on the supporting portion. The harness protector includes a harness guide portion for guiding to lead a wire harness thereto, a harness guide path, successive to the harness guide portion, along which the wire harness is routed, and a harness accommodating portion, successive to the harness guide path, for accommodating the wire harness bendably. The wire harness is led from the link to the harness protector to be routed in the harness protector. An excess length of the wire harness is absorbed into the harness accommodating portion in conjunction with rotation of the link.