To provide a catheter with a catheter shaft including a coil body as a reinforcing body, the catheter having excellent flexibility.A catheter includes a catheter shaft having an inner layer, a coil body formed of a wire spirally wound around the outer periphery of the inner layer, and an outer layer covering the coil body. The coil body includes a joint part between adjacent wires, and a main body part other than the joint part, the joint part is positioned on a distal end side of the catheter shaft than the main body part, the joint part has a slit that is a notch penetrating in the radial direction, the slit has one end and the other end, and one end is on the distal end side of the joint part than the other end, and between the wires included in the joint part, all parts except a part overlapping the slit are jointed.
