Disclosed herein are a self-foamed porous ceramic composition and a method for making a porous ceramic using the self-foamed porous ceramic composition. The self-foamed porous ceramic is obtained by fabricating a glass consisting of 41.about.47 mole % of calcium oxide (CaO), 41.about.47 mole % of silica (SiO.sub.2) and 6.about.18 mole % of borate (B.sub.2O.sub.3), pulverizing the glass into a finely-divided glass powder having an average particle size of 1.about.10 .mu.m, molding the glass powder, and sintering the molded glass powder.