Provided is an artificial tooth that can be unfailingly attached to a denture base in arranging the artificial tooth on the denture base designed and formed with a CAD/CAM, including a convex portion (21a) to be inserted in an internal corner (13a) of a concave portion (13) of the denture base, wherein the convex portion is configured to form a predetermined gap with the internal corner without having contact with the internal corner when inserted in the internal corner.
