A nonaqueous electrolytic solution comprising an electrolyte salt dissolved in an organic solvent is disclosed. The nonaqueous electrolytic solution contains a silicon compound represented by formula (I): ##STR00001## wherein R.sub.1 represents an alkenyl group having 2 to 10 carbon atoms; R.sub.2 and R.sub.3 each represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or a halogen atom; and X represents a halogen atom.