An electrode lead of a pouch-type secondary battery in which outer circumferential parts of a pouch casing are sealed and an electrode assembly is accommodated in a center part of the pouch casing, the electrode lead comprising: an inner lead at least partially formed of an electrically-conductive material, contacting an electrode tab of the electrode assembly, and interposed between the sealing parts of the pouch casing; and an outer lead disposed outside of the inner lead, at least partially formed of an electrically-conductive material, providing an external terminal connectable to an external device, interposed between the sealing parts of the pouch casing, and configured such that a portion of the outer lead contacts the inner lead and that, when an inner pressure of the pouch-type secondary battery increases, the outer lead is partially deformed and thus the portion of the outer lead is detached from the inner lead, characterized in that the inner lead comprises a tab contact part formed of an electrically-conductive material and configured to contact the electrode tab of the electrode assembly, an inner contact part formed of an electrically-conductive material, having a plate shape, located outside the tab contact part and electrically connected to the tab contact part, and an inner edge part located along an edge of the inner contact part and interposed between the sealing parts of the pouch casing, wherein the outer lead comprises an outer contact part formed of an electrically-conductive material, having a plate shape, at least partially contacting the inner contact part, and configured to be separable from the inner contact part when the inner pressure of the pouch-type secondary battery increases, a terminal part electrically connected to the outer contact part and exposed to an outside of the pouch casing such that the external device is connected to the terminal part, and an outer edge part located along an edge of the outer contact part and disposed in the sealing parts of the pouch casing to fixedly contact the sealing parts, and wherein, when the inner pressure of the pouch-type secondary battery increases, positions of the terminal part and the outer edge part are fixed, and the outer contact part moves to an outward direction and is detached from the inner contact part. an inner lead at least partially formed of an electrically-conductive material, contacting an electrode tab of the electrode assembly, and interposed between the sealing parts of the pouch casing; and an outer lead disposed outside of the inner lead, at least partially formed of an electrically-conductive material, providing an external terminal connectable to an external device, interposed between the sealing parts of the pouch casing, and configured such that a portion of the outer lead contacts the inner lead and that, when an inner pressure of the pouch-type secondary battery increases, the outer lead is partially deformed and thus the portion of the outer lead is detached from the inner lead, characterized in that the inner lead comprises a tab contact part formed of an electrically-conductive material and configured to contact the electrode tab of the electrode assembly, an inner contact part formed of an electrically-conductive material, having a plate shape, located outside the tab contact part and electrically connected to the tab contact part, and an inner edge part located along an edge of the inner contact part and interposed between the sealing parts of the pouch casing, wherein the outer lead comprises an outer contact part formed of an electrically-conductive material, having a plate shape, at least partially contacting the inner contact part, and configured to be separable from the inner contact part when the inner pressure of the pouch-type secondary battery increases, a terminal part electrically connected to the outer contact part and exposed to an outside of the pouch casing such that the external device is connected to the terminal part, and an outer edge part located along an edge of the outer contact part and disposed in the sealing parts of the pouch casing to fixedly contact the sealing parts, and wherein, when the inner pressure of the pouch-type secondary battery increases, positions of the terminal part and the outer edge part are fixed, and the outer contact part moves to an outward direction and is detached from the inner contact part.