Disclosed is a guide wire 1 including: a wire main body 11 that has flexibility a distal end member 4 that is fixed to a distal end portion of the wire main body 11 and a tubular member 5 that is provided closer to a proximal end side than the distal end member 4, and on an outer circumference of the wire main body. The tubular member 5 is provided such that the longitudinal entirety of the tubular member 5 is not fixed to the wire main body 11. The tubular member 5 is provided such that a distal end portion of the tubular member 5 is not fixed to the distal end member 4. A proximal-end side thickness reduction portion 53 with a wall thickness decreasing toward the proximal end side is provided in a proximal end portion of the tubular member 5.
