A vibration motor includes a fixed member, a vibration unit, and an elastic member. The fixed member includes a housing having a receiving space and a coil received in the receiving space and assembled with the housing. The vibration unit includes a first weight, a second weight, and a magnet sandwiched by the first and second weights. The motor further includes a positioning guiding member including a first weight guiding rail, a second weight guiding rail, a first base guiding rail formed on the bottom wall, a second base guiding rail formed on the bottom wall, a first movement rail formed by the first weight guiding rail and the first base guiding rail, a second movement rail formed by the second weight guiding rail and the second base guiding rail, and a plurality of rolling members accommodated in the first movement rail and the second movement rail.