A body vibrating device includes two rods rotatably straddled between two plates, two followers attached to the rods and coupled together with a link, two foot supports attached to the followers, a reduction gearing device disposed on the base and having an eccentric member coupled to either of the followers for allowing the followers and the rods and the foot supports to be rotated and driven by the reduction gearing device, and a motor coupled to the reduction gearing device for driving the reduction gearing device to vibrate the followers and the rods and the foot supports. The foot supports may be stably supported and driven or vibrated by the motor.