<p>An open type disposable diaper (1A) capable of preventing it from being slipped down in use and not providing partial oppressive feeling to the periphery of the body of a wearer, wherein elastically extendable waist extendable areas (10) extending in the lateral direction and a pair of elastically extendable wing extendable areas (11) extending from both side parts (9) of a rear body peripheral area (7) in the lateral outer direction are formed at the end parts (8) of a front body peripheral area (5) and the rear body peripheral area (7). In this diaper (1A), both side parts (9) in the rear body peripheral area (7) are positioned between the waist extendable areas (10) and the wing extendable areas (11), the extension stress of the wing extendable areas (11) in the lateral direction is larger than that of the waist extendable area (10) in the lateral direction, and a tension acting on the wing extendable areas (11) is parted and suppressed by both side parts (9) in the rear body peripheral area (7).</p>
