Disclosed are a ball-type attachment device for an overdenture and and a method of producing overdenture to which ball-type attachments are applied. The ball-type attachment device for overdentures according to the present invention relates to an attachment device for implant-supporting overdenture, which includes an abutment configured such that a ball-shaped coupling protrusion is formed at the exposed distal end thereof, and a retainer configured to be separably fitted over the coupling protrusion by a fitting method. The retainer includes: a cushion part made of an elastically deformable material, and configured such that a coupling recession having a shape corresponding to the ball shape of the coupling protrusion is formed so as to allow the coupling protrusion to be separably inserted and fitted into the cushion part； and a fastening part configured to be fastened to the overdenture, and configured such that an accommodation recession configured to accommodate the cushion part is formed so as to allow the cushion part to be inserted and fitted into the fastening part.
