PROBLEM TO BE SOLVED: To prevent generation of a thrombus on an outside surface and an inside surface, and to sufficiently secure contrast performance of a catheter tube in the catheter tube including an anti-thrombogenic agent and a contrast medium. SOLUTION: The outside surface and the inside surface of the catheter tube are covered with a synthetic resin composition constituted by adding the ant- thrombogenic agent to a synthetic resin, and the catheter tube is constituted by including the synthetic resin composition by adding the contrast medium to the synthetic resin inside the catheter tube.