An animal excrement disposal sheet that can reduce an area of excrement diffusing on a surface of the sheet. The animal excretion disposal sheet includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent layer disposed between the top sheet and the back surface sheet that includes a water absorbent resin and a hydrophilic fiber, in which the absorbent layer further includes a hydrophobizing agent having a higher affinity to the hydrophilic fiber than to the water absorbent resin.