Disclosed herein is a guide wire including a member with a core wire. The guide wire may have a marker-forming layer which partly encircles the outer surface of the member and differs in color from the member, and a coating layer which covers the marker-forming layer and the member at least in the region where the marker-forming layer is formed and has such transparency as to make the marker-forming layer visible, the marker-forming layer and the coating layer being formed from mutually miscible resins, and the marker-forming layer functioning as a visible marker.
