Abstract: An improved pneumatic plant-blade-from-stem separator, including an upright box having an intermediate separating chamber with an inlet for material to be separated. Beneath the box an air inlet and an outlet mouth are provided, between which a discharge plane is disposed at an angle descending toward the outlet mouth. The plane is provided with a fixed bed comprising a plurality of longitudinally extending stock of square cross-sectional shape movable so as to define slots therebetween which are transverse to the bed.