NOVELTY - The alkali primary battery comprises a cathode (3), an anode (2), a separator (4), an alkali electrolyte solution, sealing board (6), resin-made gasket (8), cathode current collector (5) and sealing agent. The anode comprises manganese dioxide and/or nickel-oxy-hydroxide. The cathode contains zinc. The sealing agent contains hot-melt resin and polybutylene. The hot-melt resin has weight average molecular weight of 1000-3000 and softening point of 95-160degrees C. The polybutylene has number average molecular weight of 300-700 and dynamic viscosity of 10-1000 mm2/second at 40degrees C.    USE - Alkali primary battery is used for supplying power for electronic and portable devices.    ADVANTAGE - The alkali primary battery is highly productive, economical, eco-friendly and maintains sealing property even under rapid temperature changes.    DETAILED DESCRIPTION - The alkali primary battery comprises a cathode, an anode, a separator, an alkali electrolyte solution, sealing board, resin-made gasket, cathode current collector and sealing agent. The anode comprises manganese dioxide and/or nickel-oxy-hydroxide. The cathode contains zinc. The separator is arranged between the cathode and the anode. The sealing board seals the opening of the battery case (1). The resin-made gasket is arranged between the battery case and the sealing board. The cathode current collector is inserted in the cathode and gasket. The sealing agent is coated between the battery case and the gasket. The sealing agent contains hot-melt resin and polybutylene. The hot-melt resin has weight average molecular weight of 1000-3000 and softening point of 95-160degrees C. The polybutylene has number average molecular weight of 300-700 and dynamic viscosity of 10-1000 mm2/second at 40degrees C. The hot-melt resin contains vinyltoluene and copolymer of kidney bean. The mixing weight ratio of the hot-melt resin and polybutylene in the sealing agent is 20-60:80-40. The sealing agent further contains a coloring agent (0.001-5 weight%) and an antioxidant (0.001-0.5 weight%).    DESCRIPTION OF DRAWING(S) - The drawing shows the cross section of the alkali primary battery.    Battery case (1)    Anode (2)    Cathode (3)    Separator (4)    Cathode current collector (5)    Sealing board (6)    Gasket (8)