Abstract: The water turbine provided by the present invention comprises a rotor which forms a rotor blade on one end and is bored with an exhaust liquid channel on the center of the axis to open to the center of the rotor blade, an inner casing which is bored with a nozzle on the circumference thereof and which supports said rotor in a manner to surround the rotor blade of the rotor and an outer casing having a liquid inlet port which defines a pressure chamber with the inner casing, and can be made so compact as to be held in a hand. The brush head for the pipe cleaning device which utilizes the water turbine as a driving source is so constructed that a brush is formed on an end of the rotor of the water turbine wherein the dirt or scale adhered to the inner surface of a pipe are peeled off with a rapidly revolving brush and then washed away with the pressurized liquid which has been used for revolving the water turbine.