TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The ion conductor is heated to a temperature more than the temperature at which the monomer shows an orientation. Subsequently, the ion conductor is cooled. The polymer precursor is coated on a base material which has flat surface. Subsequently, the polymer precursor is irradiated with an energy beam. The irradiation of energy beam is performed through an energy beam transmissive component. The base material is a negative electrode by which negative electrode material is provided at negative electrode collector, or positive electrode by which positive electrode material is provided at positive electrode collector. A polymer precursor (I) containing monomer(s) and electrolyte(s), is coated on surface of positive and/or negative electrodes, to form an ion conductor (Ia) which has anisotropy ionic conductivity. Subsequently, a polymer precursor (II) containing monomer(s) and electrolyte(s) is coated on the surface of the ion conductor. The positive electrode and the negative electrode are pressed against each other such that ion conductor (Ia) which has coated polymer precursor (II) is positioned between positive and negative electrodes. The surface of ion conductor (Ia) formed at the surface of positive electrode or negative electrode, surface of negative electrode at which ion conductor (Ia) is not formed, or positive electrode, or surface of ion conductor (Ia) formed at the surface of negative electrode or positive electrode, are contacted. Ion conductor (IIa) is formed by polymerization reaction, when the monomer in the precursor heat retains the polymer precursor (II). The polymer precursor is coated to at least one surface of the positive electrode or negative electrode. The polymer precursor (II) is positioned via ion conductor (Ia) between positive and negative electrodes which are pressed at each other to a temperature less than the temperature which shows an orientation. Preferred Segment: The ion conductor has segment of formula (1) from at least polymeric chain.R1,R2 = H or 2C or less alkyl;A,B = group(s) containing at least polyether, preferably -(CH2-CH2-O)m- or -(CH2-CH(CH3)-O)n-;R3 = group having at least 1-4C alkyl;m,n = 1-30;andm/n = 0.5-2.Alternately, the ion conductor has segment of formula (2) from at least polymeric chain.R4,R5 = H or 2C or less alkyl;X = group containing -(CH2-CH2-O)k-;k = 1-40;andR6 = alkyl benzyl group having at least 6-22C linear alkyl, or at least 6-22C linear alkyl. EXAMPLE - Methoxy-eicosa ethyleneoxy-block-eicosa propylene oxy-acrylate (ethylene oxide number, propylene oxide number of 20) was used as a monomer having polyether group (monomer (I)) in side chain. The temperature which showed an orientation was measured, and was 10degreesC, when the melting point of monomer (I) was measured by differential thermal analysis. The orientation of the monomer was observed under cross-nicol polarized light, when the temperature change was carried out. The change to bright field from a dark field was observed at 12degreesC or less. Subsequently, the monomer (I) (in wt.pts) (150), methoxy tripropylene glycol acrylate (monomer (II)) (10), polyethylene glycol-tetramethylene glycol dimethacrylate cross-linking agent (1.8) and 2,2-dimethoxy-2-phenyl acetophenone (photoinitiator) (1) were mixed. Electrolyte liquid (3070) of 2 mole/dm3 which dissolved lithium tetrafluoro borate in solution containing ethylene carbonate and gamma-butyl lactone, was added, and a polymer precursor (L1) was obtained. The precursor (L1) was introduced into a polymerization container. The polymerization container was introduced into a thermostat set at -20degreesC, and the monomer in the polymer precursor was oriented. After irradiating with ultraviolet radiation, and performing polymerization reaction and cross-linking reaction, temperature of the thermostat was made into 25degreesC, and an ion conductor was obtained. The ion conductor had excellent ionic conductivity and anisotropic ionic conductivity.