A fan motor according to the present invention includes a lower bracket having a center portion through which a rotating shaft passes, a bracket welding groove formed at an upper portion, and a lower bearing insertion space formed around the rotating shaft outside the center portion; an upper bracket having a center portion through which the rotating shaft passes, a bracket welding projection formed at a position corresponding to the bracket welding groove of the lower bracket, and an upper bearing insertion space formed around the rotating shaft inside the center portion; a rotor combined with the rotating shaft and rotating inside the upper bracket; and a stator positioned around the rotor, and the bracket welding groove and the bracket welding projection are tightly coupled to each other through ultrasonic welding.