NOVELTY - A non-aqueous electrolyte secondary battery comprises a fragile portion connected at a center portion to an inner surface of a diaphragm (6) and connected at its periphery to a current collecting tab (9) disposed below the diaphragm, where fragile portion breaks when the diaphragm deforms and rises upward; and a current collecting tab holder (7) into which a part of the current collecting tab is inserted. The current collecting tab holder is insulating and has a tab receiving portion into which an insert of the current collecting tab is inserted.    USE - Used as power source for driving electric and hybrid vehicles.    ADVANTAGE - The battery has a current interrupting mechanism with excellent impact and vibration resistance.    DETAILED DESCRIPTION - A non-aqueous electrolyte secondary battery comprises an outer can having an opening; an electrode assembly (10) housed in the outer can, and comprising a positive electrode having a positive electrode current collector and a negative electrode having a negative electrode current collector; a sealing plate (3) sealing the opening; a current collecting tab (9) connected to one of the positive and negative electrode current collectors; an external electrode terminal projecting outside the sealing plate; a diaphragm (6) disposed inside the sealing plate and outside the current collecting tab in the battery, and electrically connected to the external electrode terminal and deforming toward an outside of the battery when a battery internal pressure increases; a fragile portion connected at a center portion to an inner surface of the diaphragm and connected at its periphery to the current collecting tab disposed below the diaphragm, where fragile portion breaks when the diaphragm deforms and rises upward, interrupting current flow to the diaphragm; and a current collecting tab holder (7) into which a part of the current collecting tab is inserted, where current collecting tab includes a planar insert having the fragile portion and a current collector connecting portion connected to one of the positive and negative electrode current collectors. The current collecting tab holder is insulating and has a tab receiving portion into which an insert of the current collecting tab is inserted. The tab receiving portion is provided on both an inner surface and an outer surface with a holder hole overlapping with the fragile portion when the insert is inserted; and the diaphragm is disposed outside the tab receiving portion to cover the holder hole and is electrically connected at a center bottom to the fragile portion via the holder hole.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view of a battery.    Sealing plate (3)    Diaphragm (6)    Current collecting tab holder (7)    Current collecting tab (9)    Electrode assembly (10)