PROBLEM TO BE SOLVED: To provide a guide wire having a distal end part surely habitually bent in a desired shape, and suppressing the increase of cost, even though the guide wire is formed of a superelastic Ni-Ti alloy.SOLUTION: The guide wire 10 includes a core wire 20 having a distal end part at least made of superelastic Ni-Ti alloy, and a coil 30 made of a Pt (platinum)-based alloy or W (tungsten) arranged on the outer periphery of the distal end part of the core wire 20, the distal end part of the core wire 20 extends in a linear shape in an initial shape and the wire diameter D1 of a part of a predetermined length from the distal end tip thereof is 0.02 to 0.10 mm, a gap C1 of 0.01 to 0.08 mm is formed between the outer periphery of the part of a predetermined length from the distal end tip of the core wire 20 and the inner periphery of the coil, and the gap C2 between the adjacent coil wires 32, 32 of a part arranged on the outer periphery of the part of the predetermined length from the distal end tip of the core wire 20 of the coil 30 is 0.03 to 0.08 mm.COPYRIGHT: (C)2011,JPO&INPIT【課題】Ni-Ti系の超弾性合金から形成されていても、その先端部を所望形状に確実にくせ曲げできると共に、コスト増大を抑制できるガイドワイヤを提供する。【解決手段】このガイドワイヤ10は、少なくとも先端部がNi-Ti系の超弾性合金からなる芯線20と、芯線20の先端部外周に配置されたPt系合金又はWからなるコイル30とを備え、芯線20の先端部は、初期形状で直線状に伸びると共に、その最先端から所定長さの部分の線径D1が0.02~0.10mmとされ、芯線20の最先端から所定長さの部分の外周とコイル内周との間には、0.01~0.08mmの隙間C1が形成され、コイル30の、芯線20の最先端から所定長さの部分の外周に配置された部分の隣接するコイル線材32,32どうしの隙間C2は、0.03~0.08mmとされている。【選択図】図1
