The immobilized glucose oxidase (GOD) by ,60,Co-γ induced polymerization of HEMA at -78℃ was studied. From the experiment results, it was found that the irradation dose until 1×10,4,Gy had not a significant effect on the native GOD activity. When the carrier (HEMA) concentration was 50%, entrapped amount 1.0 ml GOD/10 ml phosphoric acid buffer solution, the immobilized GOD had not only elastic, but also had high remaining activity. The native GOD was less sensitive fo pH value than the immobilized GOD, but both the proper pH values didn't change.,The kinetic reaction results showed, Michaelis constant k'm=1.42×10,-2,mol (native GOD km=1.0×10,-2,mol). This value indicated that diffuse velocity of substitue was restricted. The activation energies of the immobilized GOD were found to be 13.7 kJ/mol.