To provide a crusher with a hopper which automatically starts the supply of other material into a storage box in which the crushed material is stored and automatically stops the supply when a specified amount of the supply of the material is attained.

This crusher is provided with a hopper 6 through which the material 10 is introduced into one part of a crushing unit 11, a hole 7 on the lower part of the hopper 6 and a hollow pipe 8 between the hopper 6 and the inside of the storage box 5 below the crushing unit 11.