NOVELTY - The electrode sheet (9,10) has an active material layer (1,2) that is formed in a collector (4,5). Several notches (8) penetrate both the collector and active material layer. The diameter of the opening portion of notch is less than 1 mm. The diameter of the notch is less than the half of rectangular longitudinal direction dimension of minimum area at which largest surface of active material layer is settled.    USE - Electrode sheet e.g. positive electrode sheet and negative electrode sheet for use in electrical storage device (claimed) such as hybrid capacitor and lithium ion secondary battery used in energy regeneration system such as uninterruptible power system, wind power generation system, and photovoltaic power generation system, and motor drive of electric vehicle. Can also be used in electrical double layer capacitor, or lithium ion capacitor.    ADVANTAGE - Since the notch is formed in the active material layer in collector, the need of providing the hole penetrated to collector is eliminated. Since lithium ion is passed through the notch which penetrates electrode sheet, the diffusion of lithium ions during doping process can be performed easily. The dope time of lithium ion can be shortened. The impairment of intensity of collector by the penetrating hole is prevented. The formation speed of active material layer is increased. Mass-productivity is improved. Hence the cost of the electrode sheet is reduced. The internal resistance of the electrical storage device is reduced.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) method for manufacturing electrode sheet; and    (2) electrical storage device.    DESCRIPTION OF DRAWING(S) - The drawing shows a top view of the positive electrode sheet, and negative electrode sheet. (Drawing includes non-English language text)    Positive electrode active material layer (1)    Negative electrode active material layer (2)    Positive electrode collector (4)    Negative electrode collector (5)    Notches (8)    Positive electrode sheets (9)    Negative electrode sheet (10)