Disclosed is a wind tower. According to an embodiment of the present invention, a wind tower to support a nacelle at a predetermined height comprises a flange unit fastened to a plurality of anchor bolts on a lower end thereof, having a plurality of bolt holes where each of the anchor bolts is inserted and fastened. Each of the bolt holes comprises a straight section having a constant radius and a chamfered section extended from a lower side of the straight section, and having a gradually increasing radius toward the bottom thereof.
