A nonaqueous electrolyte secondary battery is provided, wherein a positive electrode contains a lithium-containing transition metal oxide and a phosphoric acid compound. The nonaqueous electrolyte contains a dinitrile represented by general formula NC-A-CN (wherein A represents a linear hydrocarbon group having 1-10 carbon atoms or a hydrocarbon group that contains a main chain having 1-10 carbonatoms and at least one side chain having 3 or less carbon atoms), an ether represented by general formula R1-O-R2-O-R3 (wherein each of R1 and R3 represents a group that contains a main chain having 1-3 carbon atoms; and R2 represents linear hydrocarbon group having 1-3 carbon atoms), and a fluorophosphate salt.