A method of manufacturing a bucket tooth which is warped so that one face side becomes a concave face, comprising the steps of:

heating the bucket tooth to a predetermined temperature; and causing a warp by positively applying a coolant to an almost center portion of a face on the side opposite to a side facing a bucket lip to which said bucket tooth is attached in a quenching process after the heating, said warp having a convex face on the face to which the coolant is applied.