A bundle of a set amount of the paper sheet, at a high speed, and provides a method for extracting Kamihataba which can be extracted from the stack with extremely high accuracy. A method of extracting Kamihataba 32 from a stack 30 of a set amount of A Kamihataba 32, a plurality of sets of Kamihataba 32, the binding margin side edge upon which each form a cutout groove 36 as the forming position of the notch groove 36 in Kamihataba 32 vertically adjacent do not overlap, constitute the stack 30 stacked vertically align the orientations and each side, Kamihataba of the uppermost stack 30 32 'and upper claw 9a in contact with the upper surface of the, by the lower claws 9b obtained by advancing the distal end to the stack 30 of second layer Kamihataba 32 "of the cutout groove 36, the top layer Kamihataba 32' the sandwiched, wherein the moving in the predetermined direction. INVENTION 1.