NOVELTY - A polymer secondary battery has anode, cathode and polymer electrolyte. The polymer having cyano group or ester group and average molecular weight of 5000-1000000, is coated to boundary surface of plate and electrolyte. An oligomer having acrylate group and methacrylate group on side(s) and alkylene oxide group with branch structure, and average molecular weight of 500-3000, is crosslinked with the polymer.    USE - For electronic devices such as notebook personal computer and mobile telephone.    ADVANTAGE - The battery has excellent charging and discharging cyclic characteristics. The boundary surface contact of electrode and electrolyte is maintained stably, even when charging and discharging is repeated.    DETAILED DESCRIPTION - A polymer secondary battery has an anode containing active material (3) consisting of lithium containing metallic oxide, a cathode containing cathode active material (5) containing nitrogen compound, and polymer electrolyte. The cathode consists of carbon material which performs occlusion release of lithium metal or lithium ion, alloy. The polymer having cyano group or ester group and average molecular weight of 5000-1000000, is coated to the boundary surface of a plate and electrolyte. An oligomer having acrylate group and methacrylate group on side(s) and alkylene oxide group with branch structure, and average molecular weight of 500-3000, is crosslinked with the polymer.    An INDEPENDENT CLAIM is included for manufacture of polymer secondary battery. Coating and vacuum impregnation of polymer to at least one of anode and cathode is performed. The solution containing electrolyte, oligomer and polymerization initiator is impregnated to a separator. The anode, cathode and separator, is laminated by heating to form electrode group. The electrode group is inserted into a battery case (1), and cross-linked after sealing under reduced pressure.    DESCRIPTION OF DRAWING(S) - The figure shows the model sectional drawing of polymer secondary battery. (Drawing includes non-English language text).    Anode active material (3)    Cathode active material (5)