To relieve, primarily, burden on a carer by genuinely automatizing the treatment of excreta to allow a patient to easily empty his/her bowels, and to prevent, secondly, the adhesion of stain without allowing the excreta to be retained in a mounting apparatus.

The washing priority type excreta suction treatment apparatus comprises: a feces-and-urine sensor for allowing an excreta treatment attachment to sense discharge; and a control circuit which is set so as to turn on a water supply pump by receiving a defecation sensing signal from the feces-and-urine sensor and to turn on a suction pump.