A catheter navigation system includes a handle (100) which is operated by a user； a tube (200) which is configured to be connected to the handle (100) and is inserted into a human body； a tube navigation unit (300) which pushes one side of the tube (200) while pulling the other side so as to bend the tube (200) and thus navigate a direction of the tube； a plastic optical fiber (400) which is built in the tube (200) to transmit a light, with one end of the plastic optical fiber being exposed from a distal end of the tube (200)； and a cap (500) which is connected to the distal end of the tube (200) to close the distal end of the tube (200).
