PURPOSE: To provide a compact attaching space, improve durability and reliability of a power source code and function of soot blower by a method wherein the power source code and a wire are wound around one of driver pulleys installed at both ends of a connection rod and at the same time both extremity ends of the power source code and the wire are connected to a driving mechanism integrally installed in the inner end of a lance pipe.

CONSTITUTION: When an electric motor 16b is energized through a power supply code 21, the electric motor 16b, gear box 16a and lance pipe 14a are moved in a rightward and leftward direction under a large stroke through a gear mechanism in the gear box 16a by the electric motor 16b, and the lance pipe 14 is rotated and an injection flow of injection liquid is injected from the injection nozzle 15 under an operation of a valve 12. When the driving mechanism 16 is started to move in an arrow direction of (a), the power supply cord 21 is tensioned or pulled through an auxiliary terminal box 16 under that movement, resulting in that a driving pulley (24a) is moved in an arrow direction of (b) and in turn the wire cable 22 is apt to be loosened under a movement of the driving mechanism 16, the driving pulley 24b is also moved in a direction of arrow (b) through the driving pulley 24a and the connector rod 23 to absorb the looseness of the wire cable 22.