A water-absorbent sheet composition (51) comprising a structure in which an absorbent layer comprising a water-absorbent resin and an adhesive is sandwiched with two or more sheets of hydrophilic nonwoven fabrics (57), wherein the water-absorbent sheet composition has a structure in which the absorbent layer is fractionated into a primary absorbent layer (53) and a secondary absorbent layer (54), and wherein the water-absorbent sheet composition satisfies (1) the median particle size of the water-absorbent resin (52) used in the primary absorbent layer and the median particle size of the water-absorbent resin (54) used in the secondary absorbent layer are from 100 to 600 µm (2) the water absorption rate of saline solution of the water-absorbent resin used in the primary absorbent layer is from 20 to 70 seconds (3) the water absorption rate of saline solution of the water-absorbent resin used in the secondary absorbent layer is from 1. to 20 seconds and (4) (the water absorption rate of saline solution of the water-absorbent resin used in the primary absorbent Layer)-( the water absorption rate of saline solution of the water-absorbent resin used in the secondary absorbent layer) is 10 seconds or more. The water-absorbent sheet composition of the present invention exhibits some excellent effects that the water-absorbent sheet composition is capable of accomplishing thinning and avoidance of gel blocking phenomenon and liquid leakage, while obtaining basic properties as a water-absorbent sheet composition at a high level, even for a water-absorbent sheet composition containing a very small amount of pulps.
