An absorbent layer for a disposable wearing article having a longitudinal direction and a transverse direction orthogonal to the longitudinal direction, and comprising a front region and a rear region, wherein: the absorbent layer includes an absorbent core (34, 35) formed from at least one of fluff wood pulp and superabsorbent polymer particles, and has transversely extending front and rear end sections (15A, 15B) and an intermediate section lying between the front and rear end sections (15A, 15B); at least the intermediate section of the absorbent layer is formed with a central depression extending in the longitudinal direction; the absorbent core (34, 35) has a mass per unit area substantially uniform over an entire area thereof, except in a region corresponding to the central depression; the absorbent layer has, on both sides of the central depression, high density zones each having a density higher than those in the front and rear end sections (15A, 15B), wherein the absorbent layer includes a first absorbent core and a second absorbent core layered on an upper or lower surface of the first absorbent core, wherein the first absorbent core has a front end section lying on the front region, a rear end section lying on the rear region and an intermediate section lying between these front and rear end regions (11, 12); and the intermediate section of the first absorbent core is formed with the central depression extending in the longitudinal direction and is formed, on both sides of the central depression, with the high density zones having a density higher than those in the front and rear end sections (15A, 15B) of the first absorbent core, and wherein wherein the second absorbent core has a dimension in the longitudinal direction smaller than that of the first absorbent core, and an intermediate section of the second absorbent core overlapping the intermediate section of the first absorbent core is wider than the intermediate section of the first absorbent core. the absorbent layer includes an absorbent core (34, 35) formed from at least one of fluff wood pulp and superabsorbent polymer particles, and has transversely extending front and rear end sections (15A, 15B) and an intermediate section lying between the front and rear end sections (15A, 15B); at least the intermediate section of the absorbent layer is formed with a central depression extending in the longitudinal direction; the absorbent core (34, 35) has a mass per unit area substantially uniform over an entire area thereof, except in a region corresponding to the central depression; the absorbent layer has, on both sides of the central depression, high density zones each having a density higher than those in the front and rear end sections (15A, 15B), wherein the absorbent layer includes a first absorbent core and a second absorbent core layered on an upper or lower surface of the first absorbent core, wherein the first absorbent core has a front end section lying on the front region, a rear end section lying on the rear region and an intermediate section lying between these front and rear end regions (11, 12); and the intermediate section of the first absorbent core is formed with the central depression extending in the longitudinal direction and is formed, on both sides of the central depression, with the high density zones having a density higher than those in the front and rear end sections (15A, 15B) of the first absorbent core, and wherein