The present invention addresses the problem of providing: a nonaqueous electrolyte solution which is capable of demonstrating high output properties at a low temperature and good high-rate properties at a normal temperature, even when a cell has been used to a certain extent, and further, capable of similarly demonstrating sufficient properties at a low temperature after having been stored at a high temperature; and a nonaqueous electrolyte solution cell. Provided is a nonaqueous electrolyte solution containing a nonaqueous organic solvent and an electrolyte that dissolves in the nonaqueous electrolyte, wherein the present invention is characterized by the use of a nonaqueous electrolyte solution which contains a difluoro ionic complex (1-Cis) having a cis-type steric conformation represented by general formula (1-Cis) and at least one compound selected from the group consisting of carbonates having unsaturated bonds, carbonates having fluorine atoms, acid anhydrides, and compounds having isocyanate groups. Furthermore, the nonaqueous electrolyte solution may further comprise a difluoro ionic complex (1-Trans) or a tetrafluoro ionic complex (1-Tetra), which have a trans-type steric conformation.