Traverse device and traverse method

A traverse device for winding a wire material fed via a guide roller having a guide groove on its outer circumference on a reel while moving a winding position of the wire material with respect to the reel in a reel axis direction,

• wherein the guide roller is placed near an outer circumference of a body of the reel, and inclined, around a rotation center located near a roller outer edge on the side near the outer circumference of the reel body as a fulcrum, in a direction in which the roller outer edge recedes from one of reel flanges located ahead in a traverse direction on the side apart from the reel body, the inclining direction is switched at a midpoint position between the reel flanges, and the reel or the guide roller is reciprocated in the reel axis direction to move the winding position with the guide roller being inclined at all times except for the switching time.