An electrolyte for a non-aqueous electrolyte battery, consisting of a non-aqueous solvent and at least a hexafluorophosphate and/or tetrafluoroborate as a solute, and at least one imide anion-containing salt represented by the following general formula: in the general formula, at least one of R 1 to R 3 represents a fluorine atom, and at least one of R 1 to R 3 is selected from a methyl group, a methoxy group, an ethyl group, an ethoxy group, a propyl group, a propoxyl group, a vinyl group, an allyl group, an allyloxy group, an ethynyl group, a 2-propynyl group, a 2-propynyloxy group, a phenyl group, a phenyloxy group, a 2,2-difluoroethyl group, a 2,2-difluoroethyloxy group, a 2,2,2-trifluoroethyl group, a 2,2,2-trifluoroethyloxy group, a 2,2,3,3-tetrafluoropropyl group, a 2,2,3,3-tetrafluoropropyloxy group, a 1,1,1,3,3,3-hexafluoroisopropyl group and a 1,1,1,3,3,3-hexafluoroisopropyloxy group; M m+ represents an alkali metal cation, an alkalineearth metal cation or an onium cation; and m is an integer equivalent to the valence of the corresponding cation; and optionally, as a further solute, at least one selected from the group consisting of LiPF 2 (C 2 O 4) 2, LiPF 4 (C 2 O 4), LiP(C 2 O 4) 3, LiBF 2 (C 2 O 4), LiB(C 2 O 4) 2, LiPO 2 F 2, LiN(F 2 PO) 2, LiN(FSO 2) 2, LiN(CF 3 SO 2) 2, LiN(CF 3 SO 2)(FSO 2), LiSO 3 F, NaPF 2 (C 2 O 4) 2, NaPF 4 (C 2 O 4), NaP(C 2 O 4) 3, NaBF 2 (C 2 O 4), NaB(C 2 O 4) 2, NaPO 2 F 2, NaN(F 2 PO) 2, NaN(FSO 2) 2, NaSO 3 F, NaN(CF 3 SO 2) 2 and NaN(CF 3 SO 2)(FSO 2); and optionally further at least one additive selected from the group consisting of vinylene carbonate, vinylethylene carbonate, fluoroethylene carbonate, 1,6-diisocyanatohexane, ethynylethylene carbonate, transdifluoroethylene carbonate, propane sultone, propenesultone, 1,3,2-dioxathiolan-2,2-dioxide, 4-propyl-1,3,2-dioxathiolan-2,2-dioxide, methylene methane disulfonate, 1,2-ethanedisulfonic anhydride, tris(trimethylsilyl)borate, succinonitrile, (ethoxy)pentafluorocyclotriphosphazene, t-butylbenzene, t-amylbenzene, fluorobenzene, and cyclohexylbenzene. a non-aqueous solvent and at least a hexafluorophosphate and/or tetrafluoroborate as a solute, and at least one imide anion-containing salt represented by the following general formula: in the general formula, at least one of R 1 to R 3 represents a fluorine atom, and at least one of R 1 to R 3 is selected from a methyl group, a methoxy group, an ethyl group, an ethoxy group, a propyl group, a propoxyl group, a vinyl group, an allyl group, an allyloxy group, an ethynyl group, a 2-propynyl group, a 2-propynyloxy group, a phenyl group, a phenyloxy group, a 2,2-difluoroethyl group, a 2,2-difluoroethyloxy group, a 2,2,2-trifluoroethyl group, a 2,2,2-trifluoroethyloxy group, a 2,2,3,3-tetrafluoropropyl group, a 2,2,3,3-tetrafluoropropyloxy group, a 1,1,1,3,3,3-hexafluoroisopropyl group and a 1,1,1,3,3,3-hexafluoroisopropyloxy group; M m+ represents an alkali metal cation, an alkalineearth metal cation or an onium cation; and m is an integer equivalent to the valence of the corresponding cation; and optionally, as a further solute, at least one selected from the group consisting of LiPF 2 (C 2 O 4) 2, LiPF 4 (C 2 O 4), LiP(C 2 O 4) 3, LiBF 2 (C 2 O 4), LiB(C 2 O 4) 2, LiPO 2 F 2, LiN(F 2 PO) 2, LiN(FSO 2) 2, LiN(CF 3 SO 2) 2, LiN(CF 3 SO 2)(FSO 2), LiSO 3 F, NaPF 2 (C 2 O 4) 2, NaPF 4 (C 2 O 4), NaP(C 2 O 4) 3, NaBF 2 (C 2 O 4), NaB(C 2 O 4) 2, NaPO 2 F 2, NaN(F 2 PO) 2, NaN(FSO 2) 2, NaSO 3 F, NaN(CF 3 SO 2) 2 and NaN(CF 3 SO 2)(FSO 2); and optionally further at least one additive selected from the group consisting of vinylene carbonate, vinylethylene carbonate, fluoroethylene carbonate, 1,6-diisocyanatohexane, ethynylethylene carbonate, transdifluoroethylene carbonate, propane sultone, propenesultone, 1,3,2-dioxathiolan-2,2-dioxide, 4-propyl-1,3,2-dioxathiolan-2,2-dioxide, methylene methane disulfonate, 1,2-ethanedisulfonic anhydride, tris(trimethylsilyl)borate, succinonitrile, (ethoxy)pentafluorocyclotriphosphazene, t-butylbenzene, t-amylbenzene, fluorobenzene, and cyclohexylbenzene.