A nonaqueous electrolyte secondary battery, comprising: a coiled electrode assembly comprising: a positive electrode, formed as a continuous sheet, comprising a positive electrode current collector and a positive electrode active material layer provided on both faces of the positive electrode current collector; a negative electrode, formed as a continuous sheet, comprising a negative electrode current collector and a negative electrode active material layer provided on both faces of the negative electrode current collector; two separators, formed as continuous sheets, each comprising a base material and a heat-resistant layer provided on only one face of the base material; an electrolyte, wherein the positive electrode and the negative electrode are stacked on top of one another with the separators in a stacking unit formed of the positive electrode then a first of the two separators then the negative electrode and then a second of the two separators, and coiled together; and characterized in that: the two separators are each disposed in such a way that the heat-resistant layer is positioned on a coiling outer peripheral side with respect to the base material in the stacking direction. a coiled electrode assembly comprising: a positive electrode, formed as a continuous sheet, comprising a positive electrode current collector and a positive electrode active material layer provided on both faces of the positive electrode current collector; a negative electrode, formed as a continuous sheet, comprising a negative electrode current collector and a negative electrode active material layer provided on both faces of the negative electrode current collector; two separators, formed as continuous sheets, each comprising a base material and a heat-resistant layer provided on only one face of the base material; a positive electrode, formed as a continuous sheet, comprising a positive electrode current collector and a positive electrode active material layer provided on both faces of the positive electrode current collector; a negative electrode, formed as a continuous sheet, comprising a negative electrode current collector and a negative electrode active material layer provided on both faces of the negative electrode current collector; two separators, formed as continuous sheets, each comprising a base material and a heat-resistant layer provided on only one face of the base material; an electrolyte, wherein the positive electrode and the negative electrode are stacked on top of one another with the separators in a stacking unit formed of the positive electrode then a first of the two separators then the negative electrode and then a second of the two separators, and coiled together; and characterized in that: the positive electrode and the negative electrode are stacked on top of one another with the separators in a stacking unit formed of the positive electrode then a first of the two separators then the negative electrode and then a second of the two separators, and coiled together; and characterized in that: the two separators are each disposed in such a way that the heat-resistant layer is positioned on a coiling outer peripheral side with respect to the base material in the stacking direction.