To solve a problem that when laying a cable in a ceiling into which a person in an existing building cannot enter, the cable is laid through a method of extending a pole and drawing near to this side with the cable tied to the tip of the pole, but the extensible length is limited as the pole tip must be extended by lifting and only straight advance thereof is possible, and when sending a camera for conducting internal inspection of a pipe line, and if the pipe line is long and bent, doing so will be difficult.

A central part is pushed out and drawn by the tip of a pipe by sending a crushed state pipe inside from the center of an introducing port, by increasing pressure in a clearance made by being fixed to the introducing port by rewinding the tip of the pipe made of a flexible bendable raw material. At its time, a contact surface between the pipe and the periphery becomes a crawler track, and the pipe can be drawn without causing friction.