To manufacture a safer nonaqueous electrolyte secondary battery by providing an electrolytic solution improved in thermal stability.

An electrolytic solution with lithic salt dissolved therein for a nonaqueous electrolyte secondary battery contains a fluorine-based surfactant excellent in chemical and thermal stability 1.0-10.0 wt.%, and preferably, 1.2-5.0 wt.%. As the fluoric surfactant, for example, a perfluoroalkylpolyoxyalkylene alcohol, a perfluoroalkyl alkoxylate, a fluorinated alkyl ester, and a perfluoroalkylsulfonate, can be used. It is preferable to use a fluorinated alkyl ester having high thermal stability and having no flash point.