This absorbent article has mutually orthogonal longitudinal and width directions and comprises: an absorbent body (10) having fluid absorbency； and a plurality of folds provided along the width direction and having spaces therebetween in the longitudinal direction. The absorbent body (10) has constricted sections (19) having both sides thereof in the width direction recessed inwards in the width direction, in an area on the rear side, in the longitudinal direction, of an excretion orifice contact area wherein an excretion orifice of a wearer comes in contact therewith and further to the rear side than a rear-side fold (F2), among the plurality of folds, arranged at the closest position to the excretion orifice contact area.[課題] 提供一種即使在裝設的狀態下裝設者進行運動時，也可實現良好的貼合性的吸收性物品。 [解決手段] 具有互相正交的長邊方向及寬邊方向，並具備：液體吸收性的吸收體(10)；以及在前述長邊方向分開間隔，沿著前述寬邊方向設置的複數條折痕，前述吸收體(10)具有縮窄部(19)，該縮窄部，是前述複數個折痕中，在前述長邊方向位於與裝設者的排泄口抵接的排泄口抵接區域的後側，而在比被配置在最接近前述排泄口抵接區域的後側折痕(F2)更後側的區域，使前述寬邊方向的兩側朝前述寬邊方向的內側凹陷。
