PURPOSE: To sufficiently clean even the bent part of piping by constituting a brush head of a socket, a wire holder and piano wires and rotating the piano wires receiving centrifugal force by the rotation of the brush head in the state being in contact with the inner surface of a tube under pressure.

CONSTITUTION: A brush head 11 is constituted of a socket 12, a wire holder 13 and piano wires 14. The piano wires 14 receiving centrifugal force by the rotation of the brush head 11 are rotated in the state being in contact with the inner surface of a tube under pressure. As a result, even the bent part of piping can be sufficiently cleaned.