To provide a crusher capable of successfully being operated continually by preventing a crushed material from being clogged in an introduction part without causing bridges of the crushed material even if being fed continuously.

There is provided a crusher in which first means according to the present invention comprises: a metallic mano which has a supply part, an introduction part, and a grinding part and is fixed; a metallic bed stone which has an introduction part and a grinding part and rotates; and driving means for rotating the bed stone, wherein a screw blade is provided at a center between the introduction part and the mano.