User can attach and detach a prosthesis at will, and comfortability while wearing it is further improved. A dental prosthesis 12 of a dental prosthesis system 1 includes an incurved contact surface 58a that contacts a gingiva 24. In a first reference cross-sections including first reference lines, a distance d1 between a first point and an outer edge of the dental prosthesis 12 on a lingual side satisfies d1 ‰¤ 20 mm in an incisal portion, where the first point is an intersection of the contact surface 58a and a line connecting a center of a prosthetic tooth 32 and a position that is offset, in a direction parallel to the first reference lines, to the lingual side by 3 mm from a base end point of the prosthetic tooth 32, and in a occlusal portion, a distance d2 between a second point and the outer edge of the dental prosthesis 12 on the lingual side satisfies d2 <； 20 mm, where the second point is an intersection of the contact surface 58a and a line connecting a center of a prosthetic tooth 38 and a position that is offset, in the direction parallel to the first reference lines, to the lingual side by a/2 (a being a buccolingual diameter of the prosthetic tooth 38 in the corresponding first reference cross-section) from a base end point of the prosthetic tooth 38.
