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).本發明所要解決的問題在於提供一種拋棄式尿布，其可吸收量及吸收速度都優異。為了解決此問題，本發明的襯墊型拋棄式尿布200，其特徵在於：吸收體23A、23B，其由下層吸收體23B、及設置在該下層吸收體23B的表面側之上層吸收體23A所構成；在寬度方向隔開間隔且具有規定寬度的左右一對的狹縫40，其各自往前後方向延伸，且在包含胯間部C2之前後方向區域中，於厚度方向僅貫穿上層吸收體23A或貫穿上層吸收體23A和下層吸收體23B；頂片22，其具有下陷至狹縫40內之下陷部分30；在頂片22中的至少位於狹縫40之間的區域中，往表面側突出的多數個凸部31以隔開間隔且配置成交錯狀的方式配列；在寬度方向鄰接的凸部31的間隔32c，比位於該間隔32c的部分的前後兩側的凸部31的寬度方向尺寸31c更短。
