Abstract: A ceramic prosthesis for the living body wherein a plurality of globular or indefinite-shaped ceramic particles are bonded by sintering into one body directly or indirectly with the surface of a ceramic substrate of alumina ceramics, ziroconia ceramics or the like to permit the ingrowth of bone cells into gaps between the particles of the ceramic particles. The material is very suitable for a prosthesis such as an artifical joint in that the material is enabled to provide stront bonding and fixing thereof to the living bone by permitting early ingrowth of bone cells in the living body and to provide stability of the bonding and fixing over a long period of time.