The project of the present invention is that will not damage beauty, manufacturing cost will not be made to increase, and can externally see the presence or absence of excreta of absorber or expand.Solution forms the inside side pocket (135) of oriented surface sheets (110) side recess on the surface of the inside thin slice (120) side of the absorber (130) with Hou disposable paper nappy (1). The inside side pocket (135) has the continuous ditch of length direction (135a, 135b) in absorber (130). State of the inside side pocket (135) before the use with Hou disposable paper nappy (1), it can see on the outside of thin slice (120) from the inside, and the depth D of the inside side pocket (135), it is to absorb liquid by absorber, and it is more shallow than before absorbing liquid to constitute absorber (130). When absorber (130) absorbs liquid, by the expansion of hydrophilic fibre and the polymeric absorbent body of particle shape, absorber (130) can at least be heaved towards thickness direction, therefore watched the inside side pocket (135) from outside and looked like disappearance.本發明之課題為，不會損害美觀，也不會使製造成本增加，可從外部看見吸收體的排泄物的有無或擴大。解決手段，在用後即棄式紙尿布(1)的吸收體(130)的裏面薄片(120)側的表面，形成有向表面薄片(110)側凹陷的裏面側凹部(135)。裏面側凹部(135)具有在吸收體(130)的長方向連續的溝(135a、135b)。裏面側凹部(135)在用後即棄式紙尿布(1)的使用前的狀態，可從裏面薄片(120)的外側看見，並且裏面側凹部(135)的深度D，是藉由吸收體吸收液體，而構成吸收體(130)比吸收液體之前更淺。吸收體(130)吸收液體時，藉由親水性纖維、及粒子狀的高分子吸收體的膨脹，吸收體(130)至少會朝厚度方向鼓起，因此從外部觀看裏面側凹部(135)看起來像似消失。
