A non-aqueous electrolyte solution comprising: a non-aqueous solvent containing acetonitrile, a fluorine-containing inorganic lithium salt, and a compound represented by the following general formula: wherein A is CH or nitrogen atom, R 1 is hydrogen atom, an alkyl group having 1 to 4 carbon atoms, allyl group, propargyl group, phenyl group, benzyl group, pyridyl group, amino group, pyrrolidylmethyl group, trimethylsilyl group, nitrile group, acetyl group, trifluoroacetyl group, chloromethyl group, methoxymethyl group, isocyanomethyl group, methylsulfonyl group, phenylsulfonyl group, azidosulfonyl group, pyridylsulfonyl group, 2-(trimethylsilyl)ethoxycarbonyloxy group, bis(N,N'-alkyl)aminomethyl group, or bis(N,N'-alkyl)aminoethyl group, R 2 is an alkyl group having 1 to 4 carbon atoms, a fluorine-substituted alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a fluorine-substituted alkoxy group having 1 to 4 carbon atoms, nitrile group, nitro group, amino group, or a halogen atom, and k is an integer of 0 to 4, wherein the content of the compound represented by general formula is 0.01 to 10 parts by mass, relative to 100 parts by mass of the non-aqueous electrolyte solution and characterized in that the non-aqueous solvent contains acetonitrile in 20 to 85 % by volume. a non-aqueous solvent containing acetonitrile, a fluorine-containing inorganic lithium salt, and a compound represented by the following general formula: wherein A is CH or nitrogen atom, R 1 is hydrogen atom, an alkyl group having 1 to 4 carbon atoms, allyl group, propargyl group, phenyl group, benzyl group, pyridyl group, amino group, pyrrolidylmethyl group, trimethylsilyl group, nitrile group, acetyl group, trifluoroacetyl group, chloromethyl group, methoxymethyl group, isocyanomethyl group, methylsulfonyl group, phenylsulfonyl group, azidosulfonyl group, pyridylsulfonyl group, 2-(trimethylsilyl)ethoxycarbonyloxy group, bis(N,N'-alkyl)aminomethyl group, or bis(N,N'-alkyl)aminoethyl group, R 2 is an alkyl group having 1 to 4 carbon atoms, a fluorine-substituted alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a fluorine-substituted alkoxy group having 1 to 4 carbon atoms, nitrile group, nitro group, amino group, or a halogen atom, and k is an integer of 0 to 4, wherein the content of the compound represented by general formula is 0.01 to 10 parts by mass, relative to 100 parts by mass of the non-aqueous electrolyte solution and characterized in that the non-aqueous solvent contains acetonitrile in 20 to 85 % by volume. wherein A is CH or nitrogen atom, R 1 is hydrogen atom, an alkyl group having 1 to 4 carbon atoms, allyl group, propargyl group, phenyl group, benzyl group, pyridyl group, amino group, pyrrolidylmethyl group, trimethylsilyl group, nitrile group, acetyl group, trifluoroacetyl group, chloromethyl group, methoxymethyl group, isocyanomethyl group, methylsulfonyl group, phenylsulfonyl group, azidosulfonyl group, pyridylsulfonyl group, 2-(trimethylsilyl)ethoxycarbonyloxy group, bis(N,N'-alkyl)aminomethyl group, or bis(N,N'-alkyl)aminoethyl group, R 2 is an alkyl group having 1 to 4 carbon atoms, a fluorine-substituted alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a fluorine-substituted alkoxy group having 1 to 4 carbon atoms, nitrile group, nitro group, amino group, or a halogen atom, and k is an integer of 0 to 4, wherein the content of the compound represented by general formula is 0.01 to 10 parts by mass, relative to 100 parts by mass of the non-aqueous electrolyte solution and characterized in that the non-aqueous solvent contains acetonitrile in 20 to 85 % by volume.