A fastening tape (90) for this disposable diaper (10) is provided with a base sheet and a hook sheet. The base sheet has the following: an attachment section (93) that is attached to a side flap and a tip section (96). The length (L11) of the tip section (96) in the widthwise direction of the product is 5-12 mm. The distance (L12), in the lengthwise direction of the product, between the outer edge (in the lengthwise direction of the product) of the attachment section and the outer edge (in the lengthwise direction of the product) of the hook sheet is 2-12 mm. The length (L13), in the lengthwise direction of the product, of the boundary between the hook sheet and the tip section (96) is at least twice the distance (L14), in the lengthwise direction of the product, between the inner edge (in the lengthwise direction of the product) of the base sheet and the inner edge (in the lengthwise direction of the product) of the hook sheet. The hook sheet (92) extends further outwards, in the lengthwise direction of the product, then the point (C1) midway between the outer edge (in the lengthwise direction of the product) of the inner edge (in the widthwise direction of the product) of the hook sheet and the outer edge (in the lengthwise direction of the product) of the inner edge (in the widthwise direction of the product) of the tip section (96).用後即棄式紙尿布(10)的扣帶(90)是具備:基材薄片、與鉤薄片。基材薄片具有:被接合在側翼的接合部(93)、與前端部(96)。前端部(96)的製品寬幅方向的長度(L11)是5~12mm。接合部的製品長方向的外側端部與鉤薄片的製品長方向的外側端部的製品長方向的距離(L12)是2~12mm。鉤薄片與前端部(96)的邊界的製品長方向的長度(L13),是基材薄片的製品長方向的內側端部與鉤薄片的製品長方向的內側端部的製品長方向的距離(L14)的2倍以上。鉤薄片(92),是比鉤薄片的製品寬幅方向的內側端部的前述製品長方向的外側端部與前端部(96)的製品寬幅方向的內側端部的前述製品長方向的外側端部的中間點(C1)更朝製品長方向外側延出。R1‧‧‧第1區域R2‧‧‧第2區域L13‧‧‧製品長方向的長度96‧‧‧前端部98‧‧‧凹部C2‧‧‧中間點97‧‧‧凸部C1‧‧‧中間點92‧‧‧鉤薄片L12‧‧‧製品長方向的距離93‧‧‧接合部L14‧‧‧製品長方向的距離L15‧‧‧距離L11‧‧‧長度
