To provide a nonaqueous electrolyte secondary battery realizing high output, high output especially under a low temperature environment and improving safety.

A positive electrode is prepared by forming a positive mix layer by applying a positive mix containing a lithium-nickel-manganese-cobalt composite oxide having layered crystal structure and an average particle size of 5-20 μm, flake graphite, and PVDF to an aluminum foil. A positive electrode porosity is limited to 25-35%, and a negative electrode is prepared by forming a negative mix layer by applying a negative mix containing amorphous carbon having an average particle size of 5-20 μm, acetylene black, and PVDF to a rolled copper foil, and a negative electrode porosity is limited to 30-40%. The amount of a nonaqueous electrolyte penetrating into the positive and negative mix layers is made appropriate and the distribution of the nonaqueous electrolyte is made almost uniform.