An open-type disposable diaper (1) includes a crotch stretch unit (200a) formed in an absorber arrangement region where an absorber (40) is arranged in a crotch region (25) and being stretchable in a product longitudinal direction (L) a pair of leg stretch units (75) formed along a leg hole openings (35) and being stretchable in at least the product longitudinal direction (L) and a waist stretch unit (100) formed in a back waistline region (30) and being stretchable in a product widthwise direction (W) the absorber core arrangement region (300), enclosed by the crotch stretch unit (200a), the leg stretch units (75), and the waist stretch unit (100) and configuring the absorber (4), is formed so as not to be stretched and the length (L2) of the absorber core arrangement region (300) in the product longitudinal direction (L) is configured to be longer than half the length (L1) of the crotch stretch unit (200a) in the product longitudinal direction (L).本發明之課題係在於能夠容易且正確地裝設至穿用者。用以解決課題之手段為,本發明之吸收性物品(1)係具備有:在胯下區域(25)內形成於配置有吸收體(40)的吸收體配置區域內,並且可朝製品長度方向(L)伸縮之胯下伸縮部(200a);沿著腳圍開口部(35)形成,至少可朝製品長度方向(L)伸縮之一對腳伸縮部(75);及形成於後腰圍區域(30),可朝製品寬度方向(W)伸縮之腰圍伸縮部(100),藉由胯下伸縮部(200a)、腳伸縮部(75)及腰圍伸縮部(100)所包圍並且配置有構成吸收體(40)的吸收體芯材(40a)之吸收體芯材配置區域(300)係形成不會伸縮,在製品長度方向(L)之吸收體配置區域(300)的長度(L2)係構成為較在製品長度方向(L)之胯下伸縮部(200a)的長度(L1)之一半更長。10‧‧‧開放型用後即棄式紙尿布20‧‧‧前腰圍區域25‧‧‧胯下區域30‧‧‧後腰圍區域75‧‧‧腳伸縮部90A‧‧‧扣帶配置區域100‧‧‧腰圍伸縮部110‧‧‧低剛性區域120‧‧‧伸縮抑制區域200‧‧‧褲襠部300‧‧‧吸收體配置區域300A‧‧‧腳伸縮部與接合部分之間的區域E~E5‧‧‧端部L‧‧‧製品長度方向W‧‧‧製品寬度方向
