An object of the present invention is to provide a method for manufacturing a dental prosthesis capable of properly arranging a dental reinforcement when a dental prosthesis made of resin where the dental reinforcement is arranged is manufactured. The method includes turning information on an intraoral shape into data； designing, in a form of data, a shape of a resin body that is a part formed of resin based on the data； designing, in the form of data, a position of a dental reinforcement that is to be arranged inside the resin body； and forming, in the form of data, a space and an opening that communicates with an outside in the position in the resin body where the dental reinforcement are to be arranged, based on the position, to design a resin body with an opening.
