Non-aqueous electrolyte secondary battery

A non-aqueous electrolyte secondary battery, comprising:

• an electrode assembly in which a band-shaped positive electrode and a band-shaped negative electrode are wound with a separator interposed there between;
• an electrolyte liquid;
• and an exterior housing the electrode assembly and the electrolyte liquid, wherein the negative electrode has:
• a negative electrode current collector;
• and a negative electrode mixture layer formed on a surface of the negative electrode current collector and including a negative electrode active material and a solid electrolyte, the separator is formed from a porous sheet having an ion permeation property, and in the negative electrode mixture layer, a content rate of the solid electrolyte in an inner end of winding is higher than a content rate of the solid electrolyte in an outer end of winding, and the negative electrode mixture layer on the same surface has a region where a content rate of the solid electrolyte continuously decreases from a side of the inner end of winding to a side of the outer end of winding.