An electromagnetic speaker is disclosed and includes a frame having an elongated axis, a magnet magnetized along a radial direction and received in the frame, a voice coil fixed relatively to the frame and surrounding the magnet, a first elastic plate suspending the magnet in the frame, and a vibrating plate driven by the magnet to move along the elongated axis of the frame. By virtue of the configuration mentioned above, the electromagnetic speaker has a small form with a reduced height. Further, greater driving force is generated by the magnet driving the vibrating plate.