An animal litter box (1) includes: an inner space and an absorbent-body arrangement portion (13s). The inner space is a space where an animal performs excretion, and which is surrounded by at least a bottom surface (11b) and a wall portion (21). The bottom surface (11b) receives excrement. The wall portion (21) rises in the height direction from a periphery of the bottom surface (11b). The absorbent-body arrangement portion (13s) is for arranging of an absorbent body (200) that absorbs excrement, and is provided below the inner space in the height direction. The longitudinal central position of the inner space is located shifted from the longitudinal central position of the absorbent-body arrangement portion (13s).
