To provide the winding method of a coil for the electromagnetic acoustic transducer by which a stable operation of the electromagnetic acoustic transducer and its diaphragm whose heights are lowered is warranted.

A projection 11 is provided to a magnetic metallic flat disk 1 forming a bottom side of a package and a coil wire is wound on the projection 11 to form a coil 5. Then a magnet 4 is arranged around the coil 5, a diaphragm 6 is arranged on the upper part of the projection 11 and the magnet 4 and the diaphragm is covered by a cover 7. Furthermore, in the case of winding the coil wire on the projection 11, a tool for retaining an upper face is used to form a coil winding space which is sunk into a lower point than the tip of the projection 11 and the coil wire is wound in the space.