Provided is a water absorbent material comprising a granular core part and a coating layer part that coats the granular core part, said water absorbent material showing distinct and uniform color development and, therefore, enabling clear discrimination of check up results after use. The water absorbent material is characterized in that: the coating layer part comprises 90-96 wt% of a base material and 4-10 wt% of an excretion-checking material said excretion-checking material comprises a porous adsorbent, which is provided with micropores and has an adsorption rate of 20 wt% or greater, and an excretion-checking indicator adsorbed within the micropores of the porous adsorbent and the excretion-checking indicator is added in an amount that is greater than 0.1 wt% but not greater than 1.0 wt% relative to the total amount of the coating layer part.
