A diaper includes a chassis, a liquid-absorbent structure and containment cuffs. An inner sheet in the chassis includes a plurality of ridges and grooves extending in a longitudinal direction Y. Between a rear end of the liquid-absorbent structure and rear waist elastics, a spacing zone is defined. Cuff elastics are attached in a contractible manner to cuffs inner side edges wherein opposite ends of the cuff elastics are spaced from cuffs front and rear ends, respectively. Upon contraction of the cuff elastics, the cuffs inner side edges is pulled inward in the longitudinal direction Y and folded about the inner ends of the respective inner bond zones toward the wearers body so as to form a folded crest. Formation of the folded crest makes a portion of the inner sheet closer to its rear end than the folded crest to form a folded trough on the garment-facing side.
