The present invention provides an animal excrement disposal sheet that can prevent leakage of urine excreted from an animal to the outside in the plane direction while sufficiently securing the bonding strength between the top sheet and the back sheet. The animal excrement disposal sheet (1) of the present invention is located in the center of the animal excrement disposal sheet (1), and the top sheet (2), the absorbent body (3) and the back sheet (4) are thick. A central portion (A1) partitioned as a portion overlapping in the direction, and an outer peripheral portion (A2) extending from the outer edge of the central portion (A1) toward the outer edge of the animal excrement disposal sheet (1). Furthermore, in the said outer peripheral part (A2), it extends so that the said center part (A1) may be surrounded, and the said surface sheet (2) and the said back surface sheet (4) are joined via an adhesive agent. And a joint that extends so as to overlap with at least a part of the joint (5) in the thickness direction and that does not protrude from the first surface that is a supply surface of excreta. A water part (6).本発明は、表面シートと裏面シートの接合強度を十分に確保しつつ、動物から排泄された尿を面方向の外方側へ漏れにくくすることができる動物用排泄物処理シートを提供する。 本発明の動物用排泄物処理シート(1)は、当該動物用排泄物処理シート(1)の中央に位置し且つ表面シート(2)、吸収体(3)及び裏面シート(4)が厚さ方向に重複する部分として区画される中央部(A1)と、前記中央部(A1)の外縁から前記動物用排泄物処理シート(1)の外縁に向かって延出する外周部(A2)とを有し、 さらに、前記外周部(A2)において、前記中央部(A1)を囲繞するように延在し且つ前記表面シート(2)と前記裏面シート(4)とが接着剤を介して接合された接合部(5)と、前記接合部(5)の少なくとも一部と前記厚さ方向に重複するように延在し且つ排泄物の供給面である第1面から突出しないように露出する止水部(6)と、を備える。