Abstract: A crank 6 is connected to a prime shaft 8, a differential gear unit is coupled to the prime shaft 8, nozzles 13 and 14 for passage of wires W1 and W2 for winding are mounted to a tube 12, a rotation stopper 15 is coupled to one of facing gears of the differential gear unit, a guide rail 16 is arranged for parallel movement with the tube 12, and rotation of the crank 6 provides the nozzles 13 and 14 with swing angle and lateral displacement. The nozzles 13 and 14 perform winding while rotating around field cores 2 and 3 corresponding to the rotation angle .theta. of the crank 6.