The present invention pertains to a linear vibration motor which vibrates by the vertical movement of a vibrator. The disclosed invention includes: a case in the shape of a box that is opened at one surface portion; a vibrator received in the case and vibrates therein; a spacer formed in a shape of a cylinder that is opened at both side portions, which is mounted in the case and receives the vibrator inside; a cover coupled through curling with an opened end of the case in a state that the cover is mounted to the spacer; a cubic suspension to be protruded in the center portion thereof, having an edge portion inserted and supported between the spacer and the cover, and the center portion coupled with the vibrator so as to elastically support the vibrator; and a substrate positioned on the bottom surface of the cover and stacked with a voice coil which interacts with the vibrator. According to the linear vibration of the present invention as above, the vibrator includes a magnet and a mass body that vertically moves by the elastic force of the suspension, thereby generating vibration. Therefore, a reaction rate by an instant input of a signal that is inputted from the outside is fast, decreases the power consumption by DC driving, and differs from prior art in that the lifespan of speaker increases as friction is not generated.