To provide a storage battery with high output and low cost having a structure without apprehension of such disorders like buckling and breakage of metal base material or slipping off at welded part, and excellent falling-proof property, and to provide a method of manufacturing the battery with good productivity.

Positive electrode side belt-shaped current collector parts 21 and/or negative electrode side belt-shaped current collector parts 24, protruding in the direction of winding width of an electrode plate group 2 are divided into a plurality of connection pieces 21a, 24a by incisions 27 or notches 29 formed so as to radially extend from the winding axial center. Respective contact pieces are folded into right angle toward the winding axial center, and current collectors 9, 10 are joined to respective contact pieces 21a, 24a.