To make a crusher have both functions of crushing and classification by installing a crushing/classification means which makes a raw material supplied into a rotor collide by centrifugal force to be crushed and classifies fine powder separated by impact at crushing and a fine powder removing means for removing the classified fine powder outside.

A crushing chamber 11 is formed in a housing 1, and a rotor 2 is arranged rotatably in the middle of the chamber 11. A dead bed 12 in which a raw material is deposited is arranged as the collision part of the raw material on the periphery of the chamber 11. The raw material is supplied from the middle of the upper part of the rotor 2, released from a release port 21 by the centrifugal force of the rotor 12, made to collide with the dead bed 12, and crushed. In this way, it is separated effectively into a crushed material of a product size and fine powder and dispersed. A classification means is composed, for example, of a downward suction hood 3 arranged below the rotor 2, a suction pipe 31 for generating negative pressure in the hood 3, and others. The fine powder can be collected by installing a ring-shaped air ejecting pipe 4.