A guide wire for medical use is provided with a coil spring (20) mounted on a distal end side small diameter part (11) of a core wire (10) formed of austenitic stainless steel with a tensile strength of 2600 to 3000 MPa. The coil spring (20) has a tip end side small diameter part (21), a first taper part (22), a middle diameter part (23), a second taper part (24) and a back end side large diameter part (25). A closely coiled portion (201) is formed by the tip end side small diameter part (21), first taper part (22), middle diameter part (23) and second taper part (24), and a loosely coiled portion (202) is formed by the back end side large diameter part (25). The tip end portion of the tip end side small diameter part (21), the back end portion of the second taper part (24) and the back end portion of the back end side large diameter part (25) are affixed to the outer periphery of the distal end side small diameter part (11) of the core wire (10). This guide wire is capable of passing through even constricted areas, has high flexural rigidity, and also has exceptional push-in properties, torque conveyance properties and shape stability properties.
