Provided is a manufacturing method for absorbent products that has a process for placing on connected flaps (120) on flap line fastening members (30a, 30b) that are fastenable to prescribed areas on both sides of a center line (C) that is parallel to the MD-direction of the flap line, a process for folding over both edges of the connected flaps (120) toward the center line (C) along the MD-direction on the flap line, a process for forming flaps (20) by cutting the connected flaps (120) along the CD-direction on the flap line, and a process for placing the flaps (20) at prescribed intervals on connected absorbent products (110) on the main body line so that the center line (C) is in the MD-direction.
