PROBLEM TO BE SOLVED: To prevent a projection part projecting to the outside in a wavy part from being folded in between a surface of a diaper and the skin.SOLUTION: In a tape type disposable diaper, lower edges 70, 75 of a wing part WP have a wavy part 80 having a plurality of crest parts projecting outward, a side elastic member 64 is provided more on a width direction central side from the wing part WP in a side flap part SF, plane gathers shrunk in a longitudinal direction LD by the side elastic member 64 are provided, there is provided an overlapped region 77 in which a longitudinal direction region where shrinkage force of the side elastic member 64 acts, and at least a part of a longitudinal direction region of the wavy part 80 are overlapped, the maximum elongation of the plane gathers is 150-350%, and the maximum of a width direction WD interval between the side elastic member 64 and the wavy part 80 in the overlapped region 77 is 15 to 50 mm, and the minimum thereof is 5 to 20 mm.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2020,JPO&INPIT【課題】波状部分において外側に膨らむ張出部分がおむつの表面と肌との間に折り込まれるのを防止する。【解決手段】ウイング部分ＷＰの下縁７０，７５は、外に膨らむ山部を複数有する波状部分８０を有しており、サイドフラップ部ＳＦにおけるウイング部分ＷＰよりも幅方向中央側に、サイド弾性部材６４が設けられるとともに、このサイド弾性部材６４により前後方向ＬＤに収縮した平面ギャザーが設けられており、サイド弾性部材６４の収縮力が作用する前後方向範囲と、波状部分８０の前後方向範囲の少なくとも一部とが重なった重なり範囲７７を有しており、平面ギャザーの最大伸びは１５０～３５０％であり、重なり範囲７７における、サイド弾性部材６４と波状部分８０との幅方向ＷＤ間隔は、最大が１５～５０ｍｍで、かつ最小が５～２０ｍｍである。【選択図】図７
