The present invention provides an animal excreta disposal sheet capable of ensuring sufficient bonding strength between a surface sheet and a back sheet and preventing urine excreted from an animal from leaking to the outer side in the planar direction. This animal excreta disposal sheet (1) comprises: a center part (A1) that is located at the center of the animal excreta disposal sheet (1) and that is defined as a part in which a surface sheet (2), an absorbent body (3) and a back sheet (4) overlap one another in the thickness direction； and an outer circumferential part (A2) extending from the outer edge of the center part (A1) toward the outer edge of the animal excreta disposal sheet (1). The animal excreta disposal sheet (1) further comprises in the outer circumferential part (A2): a joining part (5) which extends so as to surround the center part (A1) and in which the surface sheet (2) and the back sheet (4) are joined via an adhesive； and a water-stop part (6) which extends so as to overlap at least a part of the joining part (5) in the thickness direction and is exposed so as not to protrude from a first surface which is a surface to which excreta is delivered.
