PURPOSE: To prevent a crusher from vibrating by providing its main shaft with a couterweight facing the eccentric position of a mantle and also by placing it on a stand through a buffer plate having a particular number of inherent vibration.

CONSTITUTION: A counterweight 13 is installed on top end of an eccentric bearing 9 facing an eccentric position of a mantle 2. When a bottom frame 4 of this crusher is installed onto a stand 17 on a foundation 16, it is installed through a shock-absorbing plate 18 made of rubber or synthetic resin, etc., whose inherent vibration number is to be 0.30W0.55 times of the crusher's vibration number. By doing this, it is possible to overcome weight restriction of a counterweight from the structural requirement so that a counterweight becomes able to fully function effectively, and at the same time, it is possible to solve the environmental nuisance problem due to the vibration by reducing the vibration conducting rate between the crusher and the foundation to the level of 1/6W1/10 taking advantage of a multiple effect in combination with the function of the shorck-absorbing plate 18.