An animal toilet having a front-rear direction, a right-left direction and a height direction including: a urine passing part that is provided with a plurality of holes through which urine passes and on which an excrement treatment material is to be placed; an absorbent body setting part that is provided below the urine passing part and on which an absorbent body is to be placed; an opening part that is provided above the urine passing part and allows an animal to come in and out; and side walls provided on both right and left sides of the opening part, a maximum height of the side wall in a forward area that is located forward of a center position in the front-rear direction being smaller than a minimum height of the side wall in a rearward area that is located rearward of the center position, a maximum opening width of the opening part in the forward area being larger than a maximum opening width of the opening part in the rearward area.