To provide a vibrating method reproducing traveling state that is difficult or impossible to be reproduced with a method of vibrating only a single wheel.

A vibration device for reproducing vibration state of wheels during traveling by vibrating a wheel T in a stop state of a vehicle, comprises a first vibrating means Sm and a second vibrating means Ss for vibrating wheels T. The first vibrating means Sm and the second vibrating means Ss are arranged in two wheels located in a diagonal line direction, out of four wheels, and the first and second vibrating means are operated in synchronization with each other.