PURPOSE: To prevent the damage on the insulating film of a conductor effectively, and to make it possible to form a winding in the intended waveform shape positively and readily.

CONSTITUTION: An inner strut 44 and an outer strut 46 are provided on a rotary table 42 in a winding jig 32. In a moving mechanism 40, a guiding jig 38 for guiding an enameled wire 36, a winding jig 32 and a guiding jig 38 are relatively moved in the axial direction and the radial direction of the rotary table 43, the enameled wire 36 is alternately wound at the inner surface of the inner strut 44 and the outer strut 46 and a waveform-shaped winding 12a is formed.