NOVELTY - A gel electrolyte comprises a solvent, an electrolyte salt, and a polymer matrix for the electrolyte salt. The polymer matrix consists of a cross-linked polymer formed by polymerizing a polyfunctional property (meth)acrylate (I).    USE - As electrolyte of non-aqueous electrolyte battery and non-aqueous electrolyte capacitor (both claimed).    ADVANTAGE - The gel electrolyte has excellent electrolyte characteristic and durability, does not have problem of liquid spilling. Non-aqueous electrolyte battery and non-aqueous electrolyte capacitor having high capability and high durability are produced efficiently using the gel electrolyte.    DETAILED DESCRIPTION - A gel electrolyte comprises a solvent, an electrolyte salt, and a polymer matrix for the electrolyte salt. The polymer matrix consists of a cross-linked polymer formed by polymerizing a polyfunctional property (meth)acrylate of formula (I).    R1,R2=2-10C alkylene;    X=monovalent group of formula (II);and    R=H or monovalent group X.    R3=H or methyl.    INDEPENDENT CLAIMS are included for the following: (i) filmy gel electrolyte (8) formed by supporting the gel electrolyte on a porous base material; (ii) non-aqueous electrolyte battery containing the gel electrolyte as electrolyte; (iii) non-aqueous electrolyte capacitor containing the gel electrolyte as electrolyte; (iv) manufacture of the gel electrolyte, which involves heating or irradiating solution containing electrolyte salt, solvent and polyfunctional property (meth)acrylate of formula (I), with actinic ray, polymerizing polyfunctional property (meth)acrylate and producing a cross-linked polymer, and forming matrix consisting of cross-linked polymer, from gel containing electrolyte salt and solvent; and (v) manufacture of filmy gel electrolyte.    DESCRIPTION OF DRAWING(S) - The figure shows the sectional drawing of the coin-shaped secondary battery using the gel electrolyte.    insulator (2)    anode (4)    anode collector (5)    cathode (6)    filmy gel electrolyte (8)