The purpose of the present invention is to enable a vibrator unit that utilizes resonant vibration to be made smaller. A vibrator unit 10 is provided with: a loop spring 12 having an elastically deformable ring shape; an inner mass-body 30 connected to the loop spring 12; and an electromagnetic actuator 40 for vibrating at a prescribed frequency a spring mass system constituted by the loop spring 12 and the inner mass-body 30, the electromagnetic actuator 40 being arranged in a ring-shaped inside space 24 of the loop spring 12. An outer mass-body is added to the loop spring 12 in addition to the inner mass-body 30 so as to make it easier to change the resonance frequency of the vibrator unit 10.
