To fix a corrugated tube in a prescribed position of a wire harness by holding the other end of a corrugated tube inserted through the wire harness in the state where one end of the corrugated tube is brought into contact with a contact plate.

A fixture 11 is arranged in a prescribed position of a wire harness 12 to be arranged along a prescribed route. After the wire harness 12 is inserted into a corrugated tube 10, one end surface 13 of the corrugated tube 10 is brought into contact with a contact plate 14. The other end side of the corrugated tube 10 is inserted into one half-ring 21 of a fixing ring 20 in this state, and the periphery of the corrugated tube 10 is nipped with the other half-ring 22. Thus, the corrugated tube 10 is positioned and fixed in the prescribed position of the wire harness. A tape winding is performed from the other end side of the corrugated tube 10, and the corrugated tube 10 is then removed from the fixing ring 20 to perform the tape winding to the one end surface 13 side, whereby the corrugated tube 10 is fixed to the wire harness 12.