A wearing article adapted to be folded up as compactly as possible in a sanitary manner utilizing the component of the wearing article itself. The wearing article having front and rear waist regions that include a first pair of lateral zones opposed to each other in a transverse direction X and extending in a longitudinal direction Y and a second pair of lateral zones opposed to each other in the transverse direction X and extending in the longitudinal direction Y, respectively. An inner sheet is provided in the respective first lateral zones with mount members defining first engagement regions and hook elements of mechanical fastener are attached to a chassis via these mount members. The respective second lateral zones of the inner sheet define second engagement regions and provided with loop elements attached thereto. The front and rear waist regions are provided with waist elastic members attached thereto under tension so as to extend in the transverse direction X. The mount members are formed by fibrous sheet adapted to be engaged with the hook members and thereby define third engagement regions.