Electrical storage element and method for its preparation

In an electric storage element, the strength of fixing a current collector is improved to a housing. A plus current conductor (6A) of a secondary battery (1) A non-aqueous electrolyte comprises a base (6a) and feet (6b, 6b), with which an electrode assembly (5) is connected. The base (6a) by a shaft of a plus outer terminal (11A) to a lid (3) fixed by caulking. The positive current collector (6A) has a welding attachment portion on the lid (3) by welding at a position opposite to a position of the legs (6b, 6b) is fixed with respect to a position at which the positive current collector (6A) by the shaft of a plus outer terminal (11A) is fixed by caulking.