NOVELTY - A nonaqueous electrolyte secondary battery consists of a negative electrode material and a positive electrode material. At least one main surface of negative electrode material and positive electrode material is covered with a crosslinked polymer solid electrolyte obtained by crosslinking a composition for solid polymer electrolyte which does not contain a crosslinking adjuvant. The negative electrode material contains a porous structural material. The electrolyte composition contains a polyether copolymer, photoreaction initiator and an electrolytic salt compound.    USE - Nonaqueous electrolyte secondary battery.    ADVANTAGE - The nonaqueous electrolyte secondary battery has high capacitance and excellent charging/discharging characteristics.    DETAILED DESCRIPTION - A nonaqueous electrolyte secondary battery consists of a negative electrode material and a positive electrode material. At least one main surface of negative electrode material and positive electrode material is covered with a crosslinked polymer solid electrolyte obtained by crosslinking a composition for solid polymer electrolyte which does not contain a crosslinking adjuvant. The negative electrode material contains a porous structural material. The electrolyte composition contains a polyether copolymer, photoreaction initiator and an electrolytic salt compound. The polyether copolymer has weight average molecular weight of 104-107, and contains 5-95 mol% of repeating unit derived from epoxy monomer of formula (I), and 95-5 mol% of repeating unit derived from epoxy monomer of formula (II).    R=1-12C alkyl or -CH2O(CR1R2R3);    R1-R3=H or -CH2O(CH2CH2O)nR4;    n=0-12;and    R4=1-12C alkyl.    An INDEPENDENT CLAIM is included for manufacture of nonaqueous electrolyte secondary battery, which involves polymerizing monomer (I) and monomer (I), obtaining polyether copolymer, applying composition for solid polymer electrolyte on one or both of negative electrode material and positive electrode material, and crosslinking the composition.