The present invention aims to provide an absorbent article adapted to define between a separator sheet and a liquid-absorbent structure a void space serving to retain feces and, in addition, to maintain an initial volume of this void space. An absorbent article includes a separator sheet (3) having opposite lateral zones extending in a longitudinal direction (Y), a middle zone (39) via which the opposite lateral zones are contiguous to each other, a front through-hole (40) formed on the side of a front waist region (7), a rear through-hole (41) formed on the side of rear waist region (8) wherein the front and rear through-holes (40, 41) are bordered by the middle zone (39), and a separator sheet biasing elastic members attached under tension to the respective lateral zones. A void space is formed between the separator sheet (3) and a liquid-absorbent structure (23) as the liquid-absorbent structure (23) bows about a crotch region (9) toward front and rear waist regions (7, 8). A chassis (2) includes a front leg elastic member (34) laid on the side of the front waist region (7) and a rear leg elastic member (35) laid on the side of the rear waist region (8) wherein at least the rear leg elastic member (35) includes a rear transverse segment (35b) extending across the crotch region (9) and a position of the rear transverse segment (35b) corresponds to a position of the middle zone (39) of the separator sheet (3).
