To provide a nonaqueous electrolyte for a secondary battery and a nonaqueous electrolyte secondary battery which are superior in output characteristics, high-temperature storage characteristics, and cycle characteristics.

In the nonaqueous electrolyte mainly made of an electrolyte and a nonaqueous solvent for dissolving the electrolyte, the nonaqueous electrolyte includes at least one kind of a compound selected from a group of chain-like saturated hydrocarbons, cyclic saturated hydrocarbons, aromatic compounds with a halogen atom, and ether with a fluorine atom, and further, includes monofluorophosphate and/or difluorophosphate.