The present invention provides an electrical double layer capacity comprising a non-aqueous electrolytic solution comprising (A) a solvent comprising a specific fluorine-containing cyclic carbonate and (B) an electrolyte salt comprising a cyclic quaternary onium salt comprising cyclic quaternary onium cation and PF6−, (CF3SO2)2N− or (C2F5SO2)2N−, and (C) a polarizable electrode, and having high withstanding voltage and assuring excellent solubility in a wide range of solvents for dissolving an electrolyte salt.