A rectal catheter plastic component is a constituent part of a rectal catheter assembly. The one piece plastic component has a cylindrical main body with an outer jacket wall. A connector component end serves for the attachment of a peripheral hose. A free component end serves for rectal insertion. At least one media lumen, extending along the main body, is arranged between at least one media connector port and at least one media opening. The media connector port is located at the connector component end, and the media opening is configured in the free component end. A further balloon-filling lumen, extending along the main body, extends between a filling connector port and a balloon-filling opening. The filling connector port is located at the connector component end, and the balloon-filling opening is configured in a balloon attachment region of the plastic component for the attachment of a balloon cuff.
