To enable the downsizing, the weight reduction, and the thickness reduction and reduce the driving current of an entire speaker without significantly deteriorating the drive capability.

A speaker includes: a diaphragm 13 attached to a frame member 11 having a predetermined shape through a damper member 12; and multiple driving units 10a, 10b, 10c, each of which has two or more coil members 14 and a magnetic member 17, converts an electric signal into an electromagnetic force, and provides the electromagnetic force to the diaphragm 13. Two or more driving units, such as the driving unit 10a, which is formed as a single unit, are disposed between the frame member 11 and the diaphragm 13. In the driving unit 10a or the like, the coil unit 14 is attached to the frame member 11 by winding a coil around a bobbin member having an air core form for a predetermined times, and two or more magnetic materials 17, each of which has a magnet, are attached to the diaphragm 13.