A disposable diaper (1) includes an absorbent member (4) containing an oblong absorbent core (40) and has a front portion (A), a crotch portion (C), and a rear portion (B). The absorbent core (4) has a high basis weight region (41) in a laterally middle part of the crotch portion (C) and a low basis weight region (42) having a lower basis weight than the high basis weight region (41) on both sides of the high basis weight region (41). The absorbent core (40) has a central bending-inducing region (43) extending in its longitudinal direction in the form of a slit, a groove, or a fiber-tree region in the high basis weight region (41) and a side bending-inducing region (44) in the form of a fiber-free region in each low basis weight region (42). The central bending-inducing region (43) extends toward the front end of the absorbent core (40) beyond the front end of each side bending-inducing region (44), and the side bending-inducing regions (44) extend toward the rear end of the absorbent core (40) beyond the rear end of the central bending-inducing region (43).
