Potency of sixty antitoxic unit was reached after two immunizations in 2-week intervals of rabbits and horses with 10-25 mg Taiwan cobra (Naja naja atra) venom which was detoxified by 0.125% glutaraldehyde. Now this procedure has become a routine antivenine-producing method by which snake bivalent neurotropic antivenine is produced. The stability test showed that Taiwan cobra toxoid kept at 37 degrees C for 40 days, the antigenicity increased by 24% and toxicity decreased by 10% as compared to the toxoid maintained at 4 degrees C.