Abstract: A surface treating device comprising a swivel bearing mechanism, an oscillating tube connected to the swivel bearing mechanism so as to be free to pivot about the axis center of the swivel bearing mechanism and such that with respect to the axis center, an end portion thereof is positioned on the side facing the object surface and the other end portion thereof is positioned on the side opposite to the object surface, a nozzle connected to the one end portion side of the oscillating tube, and a self-revolving/else-revolving mechanism connected to the other end portion side of the oscillating tube and making the nozzle self-revolve and else-revolve about the axis center of the swivel bearing mechanism.