Patent ID: 7278973

Claim:
A guide wire comprising: a linear core member; a resin layer positioned about at least a part of said core member, said resin layer including a first resin layer and a second resin layer, with the second resin layer being positioned on the distal end side of said first resin layer, said first resin layer containing a color developing agent adapted to develop a color by irradiation with laser light; a color developing portion provided on said first resin layer, said color developing portion being formed by color development of said color developing agent and being viewable under endoscopy; said first resin layer containing an X-ray contrast agent composed of a powder of a metal oxide so that the first resin layer has a contrasting function; and, said second resin layer containing an X-ray contrast agent and having a higher contrasting function compared to the contrasting function of said first resin layer.