Nonaqueous electrolyte secondary battery

The present invention provide a nonaqueous electrolyte secondary battery (1), comprising a battery element produced by laminating and winding up a positive electrode (23) and a negative electrode (27) with a separator (26) interposed therebetween, a separator is not provided on the outermost periphery of the battery element, a current collector surface of one of the positive electrode or the negative electrode is exposed to outside, and a separation-preventive tape (7) is attached on the battery element except a part of one of the longer sides on the outermost periphery. This battery increases battery capacity of a thin-walled type nonaqueous electrolyte secondary battery.