WIRE HARNESS WIRING STRUCTURE, LINK TYPE SLIDE DOOR, AND WIRE HARNESS

A wire harness wiring structure includes at least a main link arm and a wire. The main link arm has one end rotatably connected to the vehicle body and a different end rotatably connected to the door main body, and slidably supports the door main body with respect to the vehicle body while relatively rotating with respect to the vehicle body and the door main body. The wire is wired along the main link arm, and connects a connection target on the vehicle body side and a connection target on the door main body side. Then, the main link arm includes a groove portion that is formed into a groove shape along an extending direction in which the main link arm extends, and can accommodate the wire.