POWDER PROCESSING DEVICE

To achieve lower air flow rate and finer powder with a simple constitution, a powder processing device is provided with: a cylindrical housing; a raw material supply unit; a first rotating body that rotates around a center axis; a pulverizing member for pulverizing the raw material; a second rotating body that rotates around the center axis; a plurality of blades that are disposed in the second rotating body; an air inflow unit that is disposed at the lower side of the rotating body and allows inflow of an air flow to the inside of the housing; an air outflow unit for discharging the air flow, including powder, from the top of the housing; and a guide surface of which the front side is positioned more to the inside in the radial direction than the back side in the direction of rotation of the second rotating body.