PROBLEM TO BE SOLVED: To adjust a crotch part and leg peripheries in a front/back well balanced manner.SOLUTION: The tape type disposable diaper includes: a liquid permeable top sheet 30 forming a body-side surface a liquid impermeable sheet 11 located in a back side thereof an absorber 56 disposed between the liquid permeable top sheet 30 and the liquid impermeable sheet 11 and locking parts 13A provided at both sides of the back side. The tape type disposable diaper is worn by locking the locking parts 13A to a belly-side external surface. The tape type disposable diaper further includes a protrusion flap 70 protruding from the external surface of the back side, and the locking parts 13A are provided on both sides of the protrusion flap 70.
