Patent ID: 7322944

Claim:
A guide wire comprising: (a) a core wire formed with a mounting portion at a distal end portion and having a distal end; (b) a plurality of coil wires being fitted onto the mounting portion substantially in tandem, and having different mechanical properties, adjacent coil wires being connected with each other at the corresponding ends thereof, said plurality of coil wires including a first coil wire having a distal end extending from the distal end of the core wire in the proximal direction of the guide wire and a second coil wire in tandem with the first coil wire and having a distal end positioned distally of a proximal end of the first coil wire, and (c) a distal end tip formed into a solid semi-spherical shape with its spherical surface being a distal end surface of the core wire and fixed to the respective distal ends of the core wire and said first coil wire, wherein one of the corresponding ends of adjacent coil wires is formed into a tapered portion gradually reducing in outer diameter toward said end, the other one of the corresponding ends is formed into a receiving end portion into which the tapered portion is inserted, the length of the insertion of the tapered portion into the receiving end portion is 2% to 40% of the whole length of the coil wire having the receiving end portion, and the pitches of the receiving end portion of the coil wire are formed to be larger than those of the remaining portion thereof.