The absorbent core (40) constituting the absorbent body (4) of the present invention includes a fiber block (11) and a water-absorbent fiber (12F). The fiber block (11) contains weakly absorbent fibers (11F) having lower water absorption than absorbent fibers (12F). The fiber blocks (11) are intertwined with each other or the fiber blocks (11) and the water-absorbing fibers (12F). The fiber block (11) has two opposing basic planes (111) and a skeleton plane (112) connecting the two basic planes (111). The compressive strain rate of the absorbent body (4) (absorbent core body (40)) is 66% or more, and the recovery work amount is 235 mN·cm/cm 2 or more.構成本發明之吸收體(4)之吸收性芯體(40)包含纖維塊(11)與吸水性纖維(12F)。纖維塊(11)包含吸水性較吸水性纖維(12F)低之弱吸水性纖維(11F)。纖維塊(11)彼此或纖維塊(11)與吸水性纖維(12F)交絡。纖維塊(11)具備2個對向之基本面(111)、及將該2個基本面(111)連結之骨架面(112)。吸收體(4)(吸收性芯體(40))之壓縮應變率為66%以上，回復作功量為235 mN・cm/cm2以上。
