To provide a catheter with excellent torque transmissivity and excellent flexibility, enabling easy insertion into a blocked portion of a blood vessel or the like, and allowing the catheter to easily restore its original form even when a degree of curvature of the catheter becomes large and the catheter is deformed, thereby preventing a break at a border area between a catheter main body and a distal end tip and improving the operability of a combination device such as a guide wire. A catheter (1) includes a coil body (20) formed of at least one stranded wire (30) which is formed of a first wire (31a) and a plurality of second wires (31b) and is wound into a hollow helical coil structure.
