A speaker is disclosed. A speaker includes a fixing part (500) fixed to a base frame; a motion part moved with respect to the fixing part by an electromagnetic force; a vibration plate (200) that vibrates in communication with the motion part (400); and a supporting member (220) that supports the motion part to prevent the motion part from being distorted. Therefore, according to the present invention, a speaker capable of reproducing a high quality sound and high power with a slim design may be embodied.