This disposable diaper (10) is configured in a manner so that in a region within a front torso-encircling region (20), a notched section (500) is formed, and at the end (E1) in the product lengthwise direction (L) of the front torso-encircling region (20), the fibers within a top sheet (50) and an outside covering sheet (60) are compressed, reducing bulk. The fibers within the top sheet (50) and the outer covering sheet (60) are bonded by means of a state of being entangled without being having been melted.用後即棄式紙尿布(10)，在前腰圍區域(20)內的區域形成有缺口部(500)，且前腰圍區域(20)內的製品長度方向L的端部E1係構成為：將表層薄片(50)、及外裝薄片(60)內的纖維予以壓縮來減少其體積，並且係藉由表層薄片(50)、及外裝薄片(60)內的纖維未溶解而交錯的狀態來進行接合。
