When an absorbent sheet is placed on a tray, a corner portion of the sheet is prevented from greatly protruding upward. An animal toilet having a vertical direction, a horizontal direction, and a vertical direction perpendicular to each other. The horizontal wall displacement portion is displaced outward in the vertical direction as it goes outward in the horizontal direction, and the vertical wall displacement portion is displaced outward in the horizontal direction as it goes outward in the vertical direction. The joint portion with the wall displacement portion is located on the outer side in the vertical direction from the portion of the horizontal wall excluding the horizontal wall displacement portion, and is laterally outer than the portion of the vertical wall excluding the vertical wall displacement portion. The inner wall surface of the horizontal wall is tilted based on the tilt angle for the horizontal wall so that the upper part is positioned on the outer side in the vertical direction rather than the lower part in the vertical direction. The upper wall is tilted based on the tilt angle for the vertical wall so that the upper part is located outside the lower part in the vertical direction, and the maximum tilt angle for the inner wall of the horizontal wall is the inner wall surface of the vertical wall. The tray has a shape that is longer in the vertical direction than in the horizontal direction. It can be accommodated in the lower container regardless of which side of the tray is facing forward, and a horizontal wall displacement portion and a vertical wall displacement portion are provided for all corners of the four corners of the loading area. [Selection] Figure 11【課題】吸収性シートがトレイに載置された際に、同シートの角部が上方に大きく突出してしまうことを抑制する。【解決手段】互いに直交する縦方向と横方向と上下方向とを有した動物用トイレである。横壁変位部は、横方向の外側に向かうに従って縦方向の外側に変位しており、縦壁変位部は、縦方向の外側に向かうに従って横方向の外側に変位しており、横壁変位部と縦壁変位部との接合部は、横壁のうちで横壁変位部を除く部分よりも縦方向の外側に位置しているとともに、縦壁のうちで縦壁変位部を除く部分よりも横方向の外側に位置しており、横壁の内壁面は、上下方向の下部よりも上部の方が縦方向の外側に位置す
