In a manufacturing apparatus of an absorbent product, extended elastic yarns to be a first middle elastic member (47) and extended elastic yarns to be leg elastic members (44) are bonded between a first sheet (41) and a second sheet (42) with crossing each other in manufacturing an outer covering sheet (4). A first middle elastic member (47) and an inclined part (443) of the leg elastic members (44) crossing the first middle elastic member (47) are simultaneously and reliably cut in a crossing area of the both elastic members by first cutting blades tilted relatively to a direction where the first middle elastic member (47) is positioned and second cutting blades tilted relatively to a direction where the inclined part (443) is positioned. Thus, it is possible to easily form the outer covering sheet (4) which maintains elasticity in a required portion and has high flexibility.
