A pad-type disposable diaper (200), wherein an absorbent material (23A, 23B) comprises a lower-layer absorbent material (23B) and an upper-layer absorbent material (23A) arranged on the front surface side of the lower-layer absorbent material (23B), left-and-right pairs of slits (40) each having a predetermined width extend in the longitudinal direction in a longitudinal-direction region including a crotch part (C2) with leaving a space therebetween as observed in the width direction, the slits (40) penetrate through only the upper-layer absorbent material (23A) or both the upper-layer absorbent material (23A) and the lower-layer absorbent material (23B) as observed in the thickness direction, a top sheet (22) has depressed parts (30) that are respectively depressed in the slits (40), multiple protruding parts (31) that protrude on the front surface side are arranged in a zigzag alignment with leaving a space therebetween in at least a region located between the slits (40) in the top sheet (22), and the gap (32c) between adjacent two of the protruding parts (31) as observed in the width direction is shorter than the width-direction dimension (31c) of two of the protruding parts (31) which are located on both the front and back sides of the gap (32c).
