To administer a tonic and a liquid medicine.a medicine, together with the suction and decompression in a digestive tract by forming a hole communicated with a balloon lumen at a side of a basic end with respect to a hole communicated with a sub-lumen, and having a balloon part for covering the hole.

A catheter tube 1 consists of a tubular main lumen communicated from a basic end part to a neighborhood of a point part, a tubular sub-lumen communicated from a stomach body to a part over a pyloric ring when the catheter tube 1 is inserted from a fistula part in a transstomach and transintestine state, and a tubular balloon lumen communicated to a position of the balloon part used for fixing the catheter tube 1 in the insertion. A hole 6 communicated with the main lumen, a plurality of holes 7 communicated with the sub-lumen and located from the stomach body to the part over the pyloric ring in the insertion, and a hole communicated with the balloon lumen and located on a position of the balloon part 12 are respectively formed near the point part for the administration of a tonioc and a liquid medicine.a medicine.