WIRE HARNESS HOLDING STRUCTURE

A wire harness holding structure holding a wire harness includes a clamp including a U-shaped holding portion holding the wire harness and a main body portion extending from one end of the holding portion and including a bolt hole; and a bolt including a shaft portion and a head portion provided at a tip of the shaft portion. The shaft portion is inserted through the bolt hole from an opening side of the holding portion to fix the clamp to an object to be fixed. The bolt hole and the bolt are configured to shorten a gap length between the other end of the holding portion of the clamp and the head portion of the bolt to less than a diameter of the wire harness.