Shredder

Provided is a crushing machine that comprises: a pair of rotary shafts 1, 2 disposed parallel to each other; a plurality of rotary blades 3 attached, with intervals therebetween, to each of the rotary shafts 1, 2 in the axial direction, where rotary blades 3 attached to one rotary shaft 1 and rotary blades 3 attached to the other rotary shaft 2 are attached so that the rotation trajectories L1, L2 partially overlap as viewed from the axial direction of the rotary shafts; and a screen 20 which receives crushed material on the outside of the rotation trajectory L1 of the plurality of rotary blades 3 attached to the one rotary shaft 1 and which allows the crushed material of a prescribed size or less to fall. At least part of the end section of the screen 20 in the array direction of the pair of rotary shafts 1, 2 is disposed to the inner peripheral side from the rotation trajectory L2 of the rotary blades 3 attached to the other rotary shaft 2.