Abstract: A disperser including: a main body; a rotating shaft disposed in the main body; a dispersion plate provided on the rotating shaft and disposed in a flow path of an object to be treated that is to be charged into the main body; and a receiving blade body including a plurality of receiving blades provided on the rotating shaft at an angle formed with a vertical direction, the angle being a first angle, the receiving blade body being disposed on an upstream side of the dispersion plate in the flow path, in which the receiving blade body receives horizontal directional force from the object to be treated that flows down, and rotates the dispersion plate via the rotating shaft, and the disperser is not mounted with a power source for rotating the dispersion plate.