Abstract: A device for cleansing the colon includes an elastic housing with an oval-shaped end and provided with an aspiration channel and a discharge channel isolated from each other, each channel having its own outlet port in the end of the housing. An endoscope is built into the aspiration channel and is provided with a transparent balloon on its working portion, while the discharge channel accommodates an open-end capillary tube whose open end is brought outwards through the end of the housing, the other end of the tube being connected to a pressure measurement instrument.