NOVELTY - The element has an electrode terminal (23) provided in an element container. The electrode terminal and a collector (12) are connected to one another. An electrode body (11) is connected with the collector. A sheet-like insulator is provided between a main body (10) of the electrode body and the collector. The insulator is provided along a surface of the electrode body between the collector and another collector (12'). The insulator is not provided in a location in which the collector is connected. A sheet-like part is wound independently of a winding body by an outermost periphery.    USE - Electrical storage element e.g. non-aqueous electrolyte secondary battery such as lithium ion secondary battery, for an electronic device e.g. mobile telephone and information technology apparatus, and an industrial large sized electric equipment i.e. electric vehicle. Can also be used as a nickel-hydrogen battery and an electrical double layer capacitor.    ADVANTAGE - The electrode body can assign the surface covered with the insulating sheet to the collector, so that possibility that the collector can directly-contact to the main body can be avoided, thus reducing malfunction resulting from interference with the electrode body and the collector. The element releases thickness of a lamination part to direction along depth direction of a container main body to ensure dimension of the width direction of the container main body of the electrode body, so that accommodation efficiency of the electrode body can be improved.    DETAILED DESCRIPTION - The element is a non-aqueous electrolyte secondary battery (1). The element container is a cover part (20). The sheet-like part is a synthetic resin made thin insulating sheet (40).    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a structure of a non-aqueous electrolyte secondary battery.    Non-aqueous electrolyte secondary battery (1)    Main body (10)    Electrode body (11)    Collectors (12, 12')    Cover part (20)    Electrode terminal (23)    Synthetic resin made thin insulating sheet (40)