PROBLEM TO BE SOLVED: To provide an animal toilet capable of determining excretion of an animal, when the animal intends excretion.SOLUTION: An animal toilet (2) includes a weight measurement sensor (221), an excretion determination part (232) for determining that an animal is about to excrete, when fluctuation of a detection value from the weight measurement sensor falls within a prescribed range, and an excreta weight calculation part (234) for calculating the weigh of animal excreta, when determined that the animal is about to excrete.SELECTED DRAWING: Figure 1