To provide a catheter with a radiopaque marker, capable of preventing a break of the catheter by preventing excessive concentration of stress and securing the flexibility of a distal end portion of the catheter even when the catheter is inserted and curved in a blood vessel. In a catheter 1 including a catheter tube 20 and a radiopaque marker 30 arranged in the catheter tube 20, the radiopaque marker 30 is fixed so that a gap 35 is provided between the radiopaque marker 30 and the catheter tube 20 in a radial direction of the catheter tube 20.
