Provided is a disposable diaper in which sheet tearing does not occur at a portion of a joining line between a waist belt and a diaper body, and which fits the edges of leg openings very well. A pair of waist belts have waist elastic regions (41) having a plurality of waist elastic bodies (33) each of which is extensible in the lengthwise direction thereof, and are joined to a diaper body (16) through joining lines (18) having a spaced distance therebetween which decreases from the sides of leg openings (15) to the side of a waist opening (14) in front and rear waist regions (11), (12). The diaper body (16) has a leg elastic region (40) having a plurality of leg elastic bodies (26) that extend along edges of the leg openings (15). In a state in which the waist elastic region (41) and the leg elastic region (40) are stretched in a vertical direction (Y), the waist elastic bodies (33) and the leg elastic bodies (26) overlap each other in a thickness direction (Z). In a region in which both elastic regions overlap each other, the waist elastic bodies (33) and the leg elastic bodies (26) do not overlap in the thickness direction (Z), and a portion of the leg elastic bodies (26) is positioned further outside than the waist elastic bodies (33) in a horizontal direction (X).La présente invention concerne une couche jetable dans laquelle un déchirement de feuille ne se produit pas au niveau dune partie dune ligne de jonction entre une ceinture et un corps de couche, et qui sadapte parfaitement aux bords des ouvertures de jambe. Une paire de ceintures pour la taille présente des régions élastiques de taille ayant (41) une pluralité de corps élastiques de taille (33) qui sont chacun extensible dans son sens de la longueur, et sont joints à un corps de couche (16) par des lignes de jonction (18) présentant une distance despacement entre elles qui diminue depuis les côtés des ouvertures de jambe (15) jusquau côté dune ouverture de taille (14) dans des régions de taille avant et
