An animal litter box having a movable hood can be used both in the open state and the closed state, and the movable hood can be compactly accommodated in the open state. The animal litter box includes an evacuation container and a hood, the hood having a fixed hood, a movable hood, and a pair of connecting portions. On the movable hood, an opening is provided to a front surface of the movable hood, wherein, the movable hood is rotatably movable with the movable hood 32 being located outside of the fixed hood, and wherein, when the movable hood is in the open state, the movable hood covers an outside of the fixed hood.