To provide a vibrating device with only one motor and one vibrating body by disposing a vibrating body, an eccentric weight and a motor in a series and conform the hole of the center of gravity with the center of vibrating force of the eccentric weight.

A vibrating body 1, an eccentric weight 5 and a driving motor 8 are disposed in series. The axial line of the vibrating body 1 running through the center of gravity center of the vibrating body 1 and being in parallel with the axis of annular vibration of the vibrating body 1, a rotating shaft of the eccentric weight 5 and a rotating shaft of the motor 8 are disposed to form one line, and the whole of the constitution is placed on a common frame 10 and supported on a base 12 by a spring 11. The weight of the vibrating body 1 and the motor 8 and the distance to the eccentric weight 5 are so adjusted as to conform the whole of center of gravity with the center of the vibration force of the eccentric weight 5. Thus one motor and one vibrating body are enough for the constitution, and the stabilized circular vibration can be provided by a simple and inexpensive method.