Urinary catheter

The utility model relates to a urine guiding pipe which is made from anti-infection polymer materials, wherein, an inflating pipe and a discharging pipe are longitudinally embedded in the pipe wall of the urine guiding pipe and are separated from the catheter at the position near the pipe port of the urine guiding pipe; ports of the inflating pipe and the discharging pipe are provided with nozzles which can be connected with an inflating device. An air sac is arranged at a port of the side of an insertion pipe wall and is connected with the ports of the inflating pipe and the discharging pipe, which are embeddedin the wall of the urine guiding pipe. Both sides of the urine guiding pipe are respectively provided with a small hole at positions which are 30 to 40 mm away from a sealing end. The adoption of the urine guiding pipe can reduce pain when a urine guiding pipe is inserted into a patient and can obviously decrease the originating rate of relative infection caused by using a urine guiding pipe.