An electrolytic solution for nonaqueous electrolytic solution secondary batteries, the electrolytic solution comprising: a nonaqueous organic solvent, an electrolyte dissolved in the nonaqueous organic solvent, a difluoro ionic complex represented by the general formula, and at least one compound selected from the group consisting of a carbonate having an unsaturated bond, a carbonate having a fluorine atom, an acid anhydride, and a compound having an isocyanato group, wherein 95 mol% or more of the difluoro ionic complex is a difluoro ionic complex (1-Cis) in a cis configuration represented by the general formula (1-Cis), wherein in (1-Cis), wherein in the general formulas and (1-Cis), A + is any one selected from the group consisting of a metal ion, a proton, and an onium ion, and M is any one selected from the group consisting of Si, P, As, and Sb; F is a fluorine atom; O is an oxygen atom; t is 2 when M is Si, and t is 1 when M is P, As, or Sb; X is an oxygen atom or -N(R 1)-; N is a nitrogen atom; and R 1 is a hydrocarbon group having 1 to 10 carbon atoms and optionally having a hetero atom and/or a halogen atom (the hydrocarbon group optionally having a branched-chain or ring structure when the number of carbon atoms is 3 or more); when X is -N(R 1)-, and p is 0, X and W are bonded directly and optionally form a structure as shown in the general formulas (1-cis-1) to (1-cis-3) below; in the case of the general formula (1-cis-2) below where the direct bond is a double bond, R 1 is not present, Y is a carbon atom or a sulfur atom; q is 1 when Y is a carbon atom; q is 1 or 2 when Y is a sulfur atom; W represents a hydrocarbon group having 1 to 10 carbon atoms and optionally having a hetero atom and/or a halogen atom (the hydrocarbon group optionally having a branched-chain or ring structure when the number of carbon atoms is 3 or more), or -N(R 2)-; wherein, R 2 represents a hydrogen atom, an alkaline metal, or a hydrocarbon group having 1 to 10 carbon atoms and optionally having a hetero atom and/or a halogen atom; when the number of carbon atoms is 3 or more, R 2 optionally has a branched-chain or ring structure; p is 0 or 1, q is an integer of 0 to 2, r is an integer of 0 to 2, and further, p + r ≥ 1. a nonaqueous organic solvent, an electrolyte dissolved in the nonaqueous organic solvent, a difluoro ionic complex represented by the general formula, and at least one compound selected from the group consisting of a carbonate having an unsaturated bond, a carbonate having a fluorine atom, an acid anhydride, and a compound having an isocyanato group, a difluoro ionic complex represented by the general formula, and at least one compound selected from the group consisting of a carbonate having an unsaturated bond, a carbonate having a fluorine atom, an acid anhydride, and a compound having an isocyanato group, wherein 95 mol% or more of the difluoro ionic complex is a difluoro ionic complex (1-Cis) in a cis configuration represented by the general formula (1-Cis), wherein in (1-Cis), wherein in the general formulas and (1-Cis), A + is any one selected from the group consisting of a metal ion, a proton, and an onium ion, and M is any one selected from the group consisting of Si, P, As, and Sb; F is a fluorine atom; O is an oxygen atom; t is 2 when M is Si, and t is 1 when M is P, As, or Sb; X is an oxygen atom or -N(R 1)-; N is a nitrogen atom; and R 1 is a hydrocarbon group having 1 to 10 carbon atoms and optionally having a hetero atom and/or a halogen atom (the hydrocarbon group optionally having a branched-chain or ring structure when the number of carbon atoms is 3 or more); when X is -N(R 1)-, and p is 0, X and W are bonded directly and optionally form a structure as shown in the general formulas (1-cis-1) to (1-cis-3) below; in the case of the general formula (1-cis-2) below where the direct bond is a double bond, R 1 is not present, Y is a carbon atom or a sulfur atom; q is 1 when Y is a carbon atom; q is 1 or 2 when Y is a sulfur atom; W represents a hydrocarbon group having 1 to 10 carbon atoms and optionally having a hetero atom and/or a halogen atom (the hydrocarbon group optionally having a branched-chain or ring structure when the number of carbon atoms is 3 or more), or -N(R 2)-; wherein, R 2 represents a hydrogen atom, an alkaline metal, or a hydrocarbon group having 1 to 10 carbon atoms and optionally having a hetero atom and/or a halogen atom; when the number of carbon atoms is 3 or more, R 2 optionally has a branched-chain or ring structure; p is 0 or 1, q is an integer of 0 to 2, r is an integer of 0 to 2, and further, p + r ≥ 1.