a shape in which the mass body 180 may be inserted therein that is the mass body 180 cover may include a bottom plate 172 and an installation plate 173 supporting the bottom surface of the mass body 180 and a support plate 175 extended from the bottom plate 172 and the installation plate 173 toward the side surface of the mass body 180 the support plate 175 may be configured of front and rear support plates 176 and 177 supporting the front and rear surfaces of the mass body 180 and an end support plate 178 supporting the end portion thereof here the end support plate 178 may protrude from end portions of the front and rear support plates 176 and 177 in the length direction toward the end surface of the mass body 180 meanwhile the cover seat part 189 of the mass body 180 may be positioned on the installation plate 173 in addition although the bottom plate 172 and the installation plate 173 are discontinuously shown in the length direction in fig8 the present invention is not limited thereto the bottom plate 172 and the installation plate 173 may be provided integrally with each other to be continuously provided in the length direction fig9 is a perspective view illustrating a circuit board of the vibrator according to the embodiment of the present invention referring to fig9 the circuit board 200 may be connected to the piezo element 160 see fig1 and vibrated integrally with the elastic member 140 to this.