NOVELTY - The method involves performing pre dope treatment process to make negative electrode active material to occlude lithium ion in a state in which non-aqueous electrolyte solution containing reduced compound less than 0.05 weight % is made to immerse in a negative electrode body or electrode laminated body. Aging treatment process is performed to charge/discharge a non-aqueous lithium electrical storage element in state in which another non-aqueous electrolyte solution containing 0.05 weight% to 15 weight% of reduced compounds is made to immerse the electrode body or the laminated body.    USE - Method for manufacturing a non-aqueous lithium type electrical storage element for a lithium ion secondary battery and an electrical double layer capacitor for an electrical storage system for a motor vehicle, a fuel cell vehicle and a hybrid electric vehicle.    ADVANTAGE - The method enables performing the aging treatment process to charge/discharge the non-aqueous lithium electrical storage element in state in which the non-aqueous electrolyte solution containing 0.05 weight % to 15 weight % of reduced compounds is made to immerse the electrode body or the laminated body, so that gas-evolution at the time of storage of the non-aqueous lithium type electrical storage element can be suppressed, thus achieving high output characteristics with optimal charging and discharging efficiency.    DETAILED DESCRIPTION - The electrode laminated body is a lithium metal foil stacked electrode laminated body (1). The non-aqueous electrolyte solution contains linear carbonate selected from methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate and mixture of ethylene carbonate and cyclic carbonate i.e. propylene carbonate. The electrolyte contains mixed salt of lithium hexafluorophosphate and lithium tetrafluoroborate.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a lithium metal foil stacked electrode laminated body.    Lithium metal foil stacked electrode laminated body (1)    Positive electrode electrical power collector (2a)    Positive electrode bodies (2A, 2B)    Anode collector (3a)    Negative electrode active material layer (3b)    Lithium metal foil (3c)