The present invention addresses the problem of providing a novel absorbent that comprises a water-absorbing cellulose-based fiber and a thermoplastic resin fiber, said thermoplastic resin fiber containing as a monomer component an unsaturated carboxylic acid or an unsaturated carboxylic acid anhydride, and has both a sufficient strength and a sufficient absorption property. The absorbent (4a) comprises a water-absorbing cellulose-based fiber and a thermoplastic resin fiber, said thermoplastic resin fiber containing as a monomer component an unsaturated carboxylic acid or an unsaturated carboxylic acid anhydride, wherein the mass ratio (the content of the water-absorbing cellulose-based fiber:the content of the thermoplastic resin fiber) is controlled to 90:10 to 50:50 and the density of the absorbent (4a) is controlled to 0.06 to 0.14 g/cm3.本發明係關於提供一種含有纖維素系吸水性纖維,與將不飽和羧酸或不飽和羧酸酐作為單體成分含有的熱塑性樹脂纖維之吸收體,其為兼具充分強度及吸收性的新穎吸收體為課題,欲解決該課題,使含於吸收體(4a)之纖維素系吸水性纖維,與將不飽和羧酸或不飽和羧酸酐作為單體成分含有的熱塑性樹脂纖維之質量比為90:10~50:50,使吸收體(4a)的密度為0.06~0.14g/cm3。1‧‧‧生理用衛生棉(吸收性物品)2‧‧‧表層薄片(液透過性薄片)3‧‧‧背面薄片(液不透過性薄片)4a‧‧‧吸收體5a、5b‧‧‧側片層6‧‧‧本體部7a、7b‧‧‧翅膀部11a、11b、12a、12b‧‧‧密封部
