[Problem] To provide a disposable diaper wherein the front panel is easily engaged with the back panel of the disposable diaper, and the engagement does not come apart easily after engagement. [Solution] The problem is solved by a disposable diaper, which is provided with an outer covering sheet having a front panel that covers the front of the wearer, a back panel that covers the back, and an inner package comprising an absorbent on the skin-contacting surface of the outer covering sheet, and which has a waist opening and a pair of left and right leg openings formed by connecting the front panel and the back panel of the outer covering sheet by a disengageable connecting means. The disposable diaper is characterized in that: the sides of the back panel have band-shaped parts that extend in the direction of the wearers upper body the connecting means comprises first engaging components provided on the clothing-contacting surface of the sides of the front panel, second engaging components provided on the skin-contacting surface of the sides of the front panel, third engaging components provided on the clothing-contacting surface of the sides of the back panel, and fourth engaging components provided on the clothing-contacting surface of the band-shaped parts on the back panel and the first engaging components and the fourth engaging components are engaged with the band-shaped parts of the back panel folded onto the clothing-contacting surface of the front panel, and the second engaging components and the third engaging components are engaged.Le but de la présente invention est dobtenir une couche jetable dont la face avant peut être facilement fixée à la face arrière de celle-ci, et cette fixation ne se défaisant pas facilement. La présente invention concerne par conséquent une couche jetable, comprenant un feuillet couvrant externe ayant une face avant recouvrant lavant du porteur, une face arrière recouvrant larrière, et un conditionnement interne comprenant un abs
