The utility model discloses a linear vibration motor which comprises an external frame, a vibration unit and an electromagnet, wherein the external frame is composed of a top surface, a bottom surface and side surfaces; the vibration unit comprises a permanent magnet and is suspended inside the external frame through an elastic support piece; the electromagnet is installed in the external frame and is used for driving the vibration unit to produce vibration; the vibration unit and the electromagnet are arranged on one same plane parallel to the bottom surface of the external frame; the vibration direction of the vibration unit is parallel to the bottom surface of the external frame; and an elastic buffer piece is arranged on the elastic support piece or/and the side surfaces of the external frame. According to the linear vibration motor provided by the utility model, the service life of the elastic support piece is prolonged, and noise is reduced, so that the performance of the linear vibration motor is improved.