To provide a non-aqueous electrolyte secondary battery using an electrode capable of reducing internal short circuit of the battery.

The non-aqueous electrolyte secondary battery has an electrode group formed by winding a cathode, an anode, and a separator; a battery can having a beading part for housing the electrode group; a sealing body for sealing the battery can; and a cathode lead for connecting the beading part and the sealing body. Radius of curvature of the cathode lead part curved so as to face the beading part is 0.15 to 0.5 mm.