To provide a non-aqueous electrolyte secondary battery in which double or triple safety functions are provided in the battery itself.

The opening end of a battery can 1 to house plate groups 14 is sealed by a sealing port plate 3, and the battery is comprises an insulating material 11 to expose connecting terminals of positive and negative electrodes is arranged on the sealing port plate 3, a reset type current regulating element of a PTC element 9 and non-reset type current blocking element of the thermal fuse 8 are connected to positive and negative electrode leads 12, 13 led out of the electrode plate composing the plate group 14, and further the positive terminal and the negative terminal are connected. In case the positive electrode and the negative electrode are short-circuited outside, an excess current is regulated by a rapid rise in the resistance accompanying the temperature-rise of the reset type current regulating element, and when the temperature-rise free from the regulation occurs, the double safety function to block the circuit by fusing the non-reset type current blocking element is provided.