To improve imperfect winding by determining a traverse width command correction value, considering motor torque that varies with exciting angles and is related to positioning accuracy in a turn position of a traverse guide, and turning the traverse guide.

In a traverse control device 5 having a motor 11 for reciprocating the traverse guide and controlling a traverse device in which the position of the traverse guide corresponds to the position of the motor 11, a target traverse width correction means for correcting the turn position on the basis of a deviation between an actual traverse width and a target traverse width (target traverse width correction portion 56e) and an exciting state prediction means for predicting an exciting state of a stator at the timing of turn of the traverse guide (turn-timing exciting phase prediction portion 56d) are provided. The target traverse width correction means corrects the predetermined target traverse width on the basis of the predicted result of the prediction means.