PROBLEM TO BE SOLVED: To provide a shape-molded absorptive bone prosthetic material wherein, when it is transplanted in a living body, the intraosseous transplantation site can continue to exhibit high compressive strength.SOLUTION: A bone prosthetic material comprises calcium sulfate and calcium phosphate at a weight ratio of 30:70 or more and less than 100:0.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT