To impart an electrification quantity required to classify trashes to be classified and crushed consisting of plastics in a short time.

This device is provided with an outer container 12, an inner container 13 supported freely rotatably in the inside of the outer container 12, in which the crushed trash to be classified consisting of plastics is fed, a rotation mechanism for driving rotatively the inner container 13 and an agitation blade 22 arranged in the inside of the inner container 13 and for moving the crushed trash 1 to be classified fed in the inner container 13, while the trash 1 is stirred. Thus, the electrification quantity required to classify the crushed trash 1 to be classified consisting of plastics can be imparted in a short time.