Patent ID: 8608670

Claim:
A guidewire comprising: a core shaft; an inner coil that is formed by winding at least one strand, and surrounds a distal side portion of the core shaft; an outer coil that is formed by winding at least one strand, and surrounds the inner coil and the distal side portion of the core shaft; a flat part in flattened shape, which is provided in the distal side portion of the core shaft, expands in width toward a distal end of the distal side portion, and is in contact with an inner peripheral surface of the inner coil at least at the distal end of the distal side portion of the core shaft so as to form a gap between the inner coil and the outer coil; a tip joint that joins a distal end of the outer coil and a distal end of the inner coil to a distal end of the flat part of the core shaft; an outer proximal end joint that joins a proximal end of the outer coil to the core shaft; an inner proximal end joint that joins a proximal end of the inner coil to the core shaft on a distal side of the outer proximal end joint; and a coil joint that is located between the tip joint and the inner proximal end joint, and joins the inner coil to only the outer coil so as to form a gap between the inner coil and the core shaft.