There is disclosed a small-size speaker in which distortion is not easily caused when a diaphragm vertically movers for sound reproduction. The speaker includes: a bottom-equipped cylindrical frame having an opening at the top; a magnetic circuit arranged on the inner bottom of the frame; a voice coil whose coil portion is arranged in a magnetic gap of the magnetic circuit; a diaphragm arranged at the opening of the frame and its inner circumference is fixed to the voice coil while its outer circumference is fixed to the frame via a first edge; and a support body having one end fixed to the side of the diaphragm having the magnetic circuit and the other end fixed tot he vicinity of the magnetic circuit via a second edge. The first edge has a shape substantially similar to the shape of the second edge with respect to the boundary between the first edge and the second edge.
