PROBLEM TO BE SOLVED: To provide a guide wire in which the joining strength between a tip joint part and a coil body is improved and the tip joint part is prevented from being separated from the coil body. SOLUTION: In a guide wire 1 including a core shaft 5, a coil body 3 that covers the outer periphery of the core shaft 5, and a joint portion 7 that joins the tip of the core shaft 5 and the tip of the coil body 3 The base end of the portion 7 has a rectangular projection 8 projecting toward the base end in the longitudinal direction and a rectangular recess 9 projecting toward the distal end in the longitudinal direction. Is formed on. [Selection diagram] Figure 1【課題】先端接合部とコイル体との接合強度を向上させ、先端接合部がコイル体から離脱することを防止したガイドワイヤを提供する。【解決手段】コアシャフト５と、そのコアシャフト５の外周を覆うコイル体３と、コアシャフト５の先端とコイル体３の先端とを接合する接合部７とを備えたガイドワイヤ１において、接合部７の基端は、長手方向基端側に突出する矩形状の凸部８と、長手方向先端側に突出する矩形状の凹部９とによって、横断面視外周方向に沿って長手方向凹凸形状に形成されている。【選択図】図１
