To solve the problem of a conventional electromagnetic or dynamic electroacoustic transducer that cannot have been downsized because of the permeability and the saturation magnetic flux density of a magnetic diaphragm and a yoke and the saturation magnetic flux density of a permanent magnet.

The magnetic diaphragm 14 of the electromagnetic electroacoustic transducer of this invention is configured with a soft magnetic substance with a high saturation magnetic flux density and a high permeability to attain the compatibility between downsizing/weight reduction and a high quality sound characteristic of the electromagnetic type electroacoustic transducer. Further, reduction in the number of components can provide an inexpensive small-sized sounding body and also can be helpful to extend application ranges of the acoustic component.