This invention arranges electromagnetic steel sheets different in magnetic property at optional lamination thickness ratio in order to equalize magnetic flux distribution within an identical wound core, since a magnetic flux distribution within an iron core for stillness apparatus deviates in magnetic flux toward internal periphery side short in magnetic path with respect to all lamination thickness and small in magnetic resitance, and the internal periphery side concentrated by the magnetic flux increases in iron loss due to high magnetic flux density. A uniformity of the magnetic flux distribution within a cross section of iron core can be obtained by arranging the electromagnetic steel sheets inferior in magnetic property to that of external periphery side in the internal periphery side short in the magnetic path and small in the magnetic resistance, and the electromagnetic steel sheets superior in the magnetic property to that of internal periphery side in the external periphery side long in the magnetic path and big in the magnetic resistance for equalizing the magnetic flux distribution within the iron core for stillness apparatus.