To provide a nonaqueous electrolyte secondary battery, in which generation of an inside short can be reduced during preservation in a charged state and reliability can be enhanced.

A nonaqueous electrolyte secondary battery comprises a negative electrode 1 including lithium, a lithium alloy or a carbon material capable of doping or de-doping lithium, a positive electrode 2 using a lithium-containing compound, and a nonaqueous electrolyte. The nonaqueous electrolyte secondary battery is constituted such that the ratio of the total thickness of the negative and positive electrodes 1, 2 to the total thickness of the battery is 11% or more and 20% or less. Furthermore, the nonaqueous electrolyte secondary battery is constituted, such that a ratio of the total thickness of the negative and positive electrodes 1, 2 to a unit battery capacity 1 mAh is 3.4×10-2 μm or more and 6.5×10-2 μm or less. Consequently, it is possible to provide a nonaqueous electrolyte secondary battery in which the generation of an inside short circuit can be reduced, while the capacity is secured.