NOVELTY - The element has an electrode case (400) that is provided with a positive electrode (410) and a negative electrode (420). The separators (430,440) are positioned between the positive and negative electrodes such that the separator (430) and lamination-positioned separator (440) are included in a state in which the separation of separator (430) is possible. The orientation direction is configured to differ between the separators. The orientation directions for the separators are arranged so as to be orthogonal to each other.    USE - Electrical storage element such as non-aqueous electrolyte secondary battery and lithium ion secondary battery used as power supply of electric vehicle such as hybrid electric vehicle (HEV).    ADVANTAGE - The separators are positioned between the positive and negative electrodes such that the first separator and lamination-positioned second separator are included in a state in which the separation of first separator is possible so that the separators with different orientation directions does not receive the influence without mutually restraining separators even when the heat shrink and fracture are generated in a side. Thus, the heat shrink and fracture generated in the direction as whole separator are suppressed efficiently. Hence, the damage of separator by the internal short circuit is prevented effectively while improving the crushing-under-pressure safety. Since the separator corresponding for every factor is selected independently and is combined with respect to the crushing-under-pressure factors such as external stress and heat shrink, the freedom degree of material design is improved effectively. Since the separators are formed by the cellulose fiber such as paper or nonwoven fabric with high porosity, the ionic permeability of separators is improved while reducing the cell internal resistance. Thus, the output performance of secondary battery is improved effectively while reducing the manufacturing cost of secondary battery.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing electrical storage element.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the electrode case.    Electrode case (400)    Positive electrode (410)    Negative electrode (420)    Separators (430,440)