Provided is a diaper (1) comprising a belly-side external member (2a) and a back-side external member (2b) each including a non-skin-side sheet (22) and a skin-side sheet (21), wherein a plurality of elastic members (4) are provided in a vertical direction between the non-skin-side sheet (22) and the skin-side sheet (21), at least one of the non-skin-side sheet (22) and the skin-side sheet (21) in at least one of the belly-side external member (2a) and the back-side external member (2b) is provided with a plurality of cut lines (5), a first cut line (51) and a second cut line (52) are provided between a first elastic member (41) and a second elastic member (42) adjacent to each other, a first overlapping portion (5a) at which the first cut line (51) and the second cut line (52) overlap with each other in a horizontal direction is provided, a third cut line (53) and a fourth cut line (54) are provided between the second elastic member (42) and a third elastic member (43) adjacent to each other, a second overlapping portion (5b) at which the third cut line (53) and the fourth cut line (54) overlap with each other in the horizontal direction is provided, and the first overlapping portion (5a) and the second overlapping portion (5b) partially overlap with each other in the horizontal direction.Linvention concerne une couche (1) comprenant un élément externe côté ventre (2a) et un élément externe côté dos (2b) comprenant chacun une feuille qui nest pas côté peau (22) et une feuille côté peau (21), une pluralité déléments élastiques (4) étant placés dans une direction verticale entre la feuille qui nest pas côté peau (22) et la feuille côté peau (21), au moins une parmi la feuille qui nest pas côté peau (22) et la feuille côté peau (21) dans au moins un élément parmi lélément externe côté ventre (2a) et lélément externe côté dos (2b) comporte une pluralité de lignes de coupe (5), une première ligne de coupe (51) et une deuxième ligne de coupe (52) étant placées entre un p
