The invention provides an excreta treatment device which can treat excreta of a person requiring nursing without discomfort and can reduce burden of a nurse. The excreta treatment device with a small size and low noise is characterized in that washing water from a water delivery pump (39) of a water supply unit (25) is injected into a main diaper cup body (10) and washes a urinary apparatus and excreta, the excreta is sucked by work wind of an suction motor (31), the excreta and the washing water are separated and collected, only the work wind is purified and returned by an suction circulating pipe (50) to the main diaper cup body (10) for circulation for the excreta treatment device, the suction circulating pipe (50) is led out to a cooling unit (55) outside an equipment storage box (12) from a discharge side of the suction motor (31), and then the work wind in the suction circulating pipe (50) in the cooling unit (55) exchanges heat with outside air, is cooled and returned to a return box unit (27).
