A diaper for adults includes a front waist region, a rear waist region and a crotch region extending therebetween, wherein side edge portions of the front and rear waist regions are detachably connected to each other so as to form a waist hole and a pair of leg holes, the side edge portions have a dimension of at least 150 mm as measured in a longitudinal direction, and a position correcting system to correct relative position of first and second fastening components when the first and second waist regions are connected to each other comprises at least one spacing zone defined between setting zones for tow or more fastening components into which the first fastening component is divided in the longitudinal direction.