To surely make the through load condition of a wire harness smaller than a through-hole and a narrow passage width and to improve the mounting operability of the wire harness.

In this packaging material, a wire harness W/H which is formed by bundling many wires in which connectors 3 or the like are attached to terminals is wrapped and packaged, and the wire harness W/H is inserted into, and passed through a through-hole or a narrow wire insertion and passage part. The packaging material is constituted, in such a way that it is composed of a synthetic resin or rubber tube 10, that the inside diameter of the tube 10 is set to be smaller than the inside diameter or the narrow passage width of the through-hole, and that the wire harness W/H is inserted and held inside the tube 10. In the tube 10, a slit in the length wise direction may be formed from its tip. In addition, the tip of the tube may be cut obliquely.