The present invention relates to a method for manufacturing an electrode assembly and an electrode assembly manufactured by the same, and the method comprises the steps of: preparing an electrode laminate including at least one cathode, at least one anode and at least one separation film; generating a separation film assembly by bonding surplus separation films located in a region which does not correspond to the shapes of the cathode and the anode; and cutting the separation film assembly so as to correspond to the shapes of the cathode and the anode.