A disposable diaper having front and rear waist regions that comprise an upper elasticized region extending in a vicinity of a waist-opening periphery, lower elasticized regions, intermediate elasticized region extending between the upper elasticized region and the lower elasticized regions and outside longitudinally opposite ends of a liquid-absorbent structure. At least in the front waist region of the front and rear waist regions, there is a non-elasticized region opposed to a central zone of a liquid-absorbent core wherein a tensile stress of the intermediate elasticized region is lower than a tensile stress of the upper elasticized region.
