[Problem] To provide a disposable diaper which is comfortable to wear. [Solution] This disposable diaper comprises a top sheet (1), a back sheet (2), an absorber (3) and a stretchable sheet (4). The stretchable sheet (4) is composed by having a base material sheet (41) sandwich multiple elastic stretchable members (42) disposed therein in an extended state, said multiple elastic stretchable members (42) being disposed along the width direction of the disposable diaper and spaced apart at intervals in the longitudinal direction. When viewed in the width direction, the stretchable sheet (4) has an overlapping portion (43) which includes a region that overlaps with a part of the absorber (3). In the overlapping portion (43), the multiple elastic stretchable members (42) are disposed continuously along the width direction. The multiple elastic stretchable members (42) are not joined to the sides of the base material sheet (41) at the central region (43a) of the overlapping portion (43), said central region (43) being where part of the absorber (3) is overlapped, and are joined to the sides of the base material sheet (41) at the side regions (43b) of the overlapping portion (43) which are positioned to the outside of the central region (43a) in the width direction.[Problème] Produire une couche jetable qui est confortable à porter. [Solution] La présente invention concerne une couche jetable comprenant une couche supérieure (1), une couche arrière (2), un absorbeur (3) et une couche étirable (4). La couche étirable (4) est constituée dune couche de matériau de base (41) dans laquelle sont intercalés plusieurs composants étirables élastiques (42) dans un état étiré, lesdits composants étirables élastiques multiples (42) étant disposés dans la direction transversale de la couche jetable et espacés à des intervalles dans la direction longitudinale. Observée dans la direction transversale, la couche étirable (4) comporte une partie de recouvrement (43) qui comprend une régio
