A wearing article in which a front waist region and a rear waist region can be easily and accurately engaged with each other. A first fastening element (13) is installed on a front edge section (11) of the front waist region (8), and a second fastening element (14) engageable with the first fastening element (13) is installed on a rear edge section (12) of the rear waist region (9). The second fastening element (14) has a bellows structure extending in the lateral direction (X) and having crests (17) spaced in the longitudinal direction (Y). Even if a bellows region (16) where the bellows structure is formed makes contact with the first fastening element (13) with the bellows contracted, they are engaged with each other with a weak force and can be easily disengaged from each other. When the bellows region (16) is stretched in the longitudinal direction (Y) and made to make contact with the first fastening element (13), they can be in contact with each other in a large area to be firmly engaged with each other.
