Provided is a manufacturing method for absorbent products that has a fastening member placement step (S21) wherein latch members (40a, 40b), which are fastenable to prescribed areas, are placed on both sides of a center line (C) that is parallel to the conveyance direction of the flap line on a flap continuum (130) that are continuously conveyed on the flap line, a flap formation process (S23) wherein flaps (30) are formed by cutting the flap continuum (130) on the flap line in a direction that intersects with the conveyance direction of the flap line, and a flap placement step (S33) wherein flaps are placed on front waistline member continuum or the rear waistline member continuum (120a) or (120b) on the main body line so that the center line (C) is orthogonal to the conveyance direction of the main body line, and both edges (50a, 50b) of the flap continuum (130) on the flap line are folded over toward the center line (C).
