This absorbent article (1) has a fluid permeable surface sheet (2), a fluid impermeable back sheet (3), and an absorber (4) disposed between the two sheets. The absorber (4) has an absorbent core (41) that includes a pulp fiber, and a core wrap sheet (42) that has voids and covers the absorbent core (41). A water-soluble hemagglutination agent is disposed in the core wrap sheet (42) that covers a skin facing surface side of the absorbent core (41). The hemagglutination agent is held filling the voids of the core wrap sheet (42) and when moisture permeates the core wrap sheet (42), the hemagglutination agent dissolves to favorably increase gaps in the voids.本發明之吸收性物品(1)具備液體透過性之正面片材(2)、液體不透過性之背面片材(3)及配置於該等兩片材間之吸收體(4),吸收體(4)具有含有紙漿纖維之吸收性芯體(41)及具有孔隙部且被覆吸收性芯體(41)之包芯片材(42),於被覆吸收性芯體(41)之肌膚對向面側之包芯片材(42)配置有水溶性血球凝集劑。亦較佳為,血球凝集劑保持為填充包芯片材(42)之孔隙部之狀態,於水分透過包芯片材(42)時,血球凝集劑溶解,孔隙部內之空隙增大。
