PROBLEM TO BE SOLVED: To provide a prosthesis having a detachable upper structure and a screw related thereto.SOLUTION: A detachable prosthesis includes a support base, an upper structure, and a screw. The support base includes a support base connector and a hollow chamber having a support base wall with a screw hole formed thereon. The upper structure is provided with a storing region and an inner face surrounding the storing region. The screw includes a screw head and a screw rod. The screw head includes a contact part and a guiding part positioned between the contact part and the screw rod. When the screw is positioned in the screw hole, a part of the screw head is projected outward from an outer surface of the hollow chamber.SELECTED DRAWING: Figure 1
