The present invention addresses the problem of providing: a non-aqueous electrolyte solution which, with respect to a non-aqueous electrolyte solution secondary battery, simultaneously improves an initial battery characteristic and the battery characteristic after durability testing; and the non-aqueous electrolyte solution secondary battery which uses this non-aqueous electrolyte solution. The present invention pertains to a non-aqueous electrolyte solution for a non-aqueous electrolyte solution secondary battery comprising a positive electrode and a negative electrode that are capable of absorbing and desorbing metal ions. As well as containing an electrolyte and a non-aqueous solvent, the non-aqueous electrolyte solution is characterised by containing an aromatic carboxylic acid ester represented by formula (1) or containing (I) an aromatic carboxylic acid ester represented by formula (2) and (II) at least one compound selected from the group consisting of: a fluorine-containing cyclic carbonate; a sulphur-containing organic compound; a phosphonic acid ester; an organic compound having a cyano group; an organic compound having a isocyanate group; a silicon-containing compound; an aromatic compound other than formula (2); a carboxylic acid ester represented by formula (3); a cyclic compound having a plurality of ether bonds; a monofluorophosphoric acid salt; a difluorophosphoric acid salt; a boric acid salt; an oxalic acid salt; and a fluorosulphonic acid salt. The present invention also pertains to a non-aqueous electrolyte solution secondary battery which is equipped with a positive electrode and a negative electrode that are capable of absorbing and desorbing lithium ions and is further equipped with the non-aqueous electrolyte solution that includes the electrolyte and the non-aqueous solvent. This non-aqueous electrolyte solution is the aforementioned non-aqueous electrolyte solution.