PURPOSE: To obtain the porous body of calcium phosphate compd. which has both proper physical strength as the filler (prosthesis) of bones and teeth and porosity capable of growing the bony tissue therein by kneading calcium phosphate compd. and nonvolatile organic liquid and thereafter molding this kneaded material and sintering the molded material.

CONSTITUTION: Calcium phosphate compd. and nonvolatile organic liquid are kneaded and thereafter this kneaded material is molded and the molded body is sintered. As calcium phosphate compd., hydroxyapatite and tricalcium phosphate are utilized and besides calcium hydrogenphosphate, calcium dihydrogenphosphate and compds. contg. several impure components may be utilized. As the nonvolatile organic liquid, the aqueous liquid material of methyl cellulose, polyethylene glycol or PVA are preferably utilized. A porous body having required porosity (about 20-60%) especially available as an implanting material of bones and a dental root is obtained by properly selecting the amount of the organic liquid. Sintering is preferably performed at 600-1300°C in the oxidative atmosphere such as air.