To improve the fractionation accuracy for light weight plastics and the like by utilizing the ionic wind generated by corona discharge.

An ionic wind area blowing ionic wind EW from an electrode unit 14 toward a conductive rotor 11 is formed on a selection flow path 13 flowing down along the tangential direction to the conductive rotor 11. This device is provided with a conductive trash recovering tray 21 for guiding conductive trash Da passing through the ionic wind area and discharged downward, a semiconductive trash recovering duct 22 for attracting separation of the semiconductive trash Db of weak attraction force from crushed trash D blown up by the ionic wind EW and attracted on the conductive rotor 11, and a conductive trash recovering tray 23 for discharging semiconductive trash Dc attracted and rotated on the conductive rotor 11.