PROBLEM TO BE SOLVED: To provide a guide wire having desired functions added thereto, according to a content and application of a procedure to be used, while suppressing complication of manufacture work and increase in a production cost, and a medical coil being usable in various types of medical instruments.SOLUTION: A coil part 130 of a guide wire 100 includes: an inner peripheral side 130A and an outer peripheral side 130, formed thereon and at least one overlap part 170 formed by overlapping, in a cross section along the axial direction of a core part, one portion 150 located at a proximal side out of adjacent portions of a wire 140 and the other portion 160 located at the distal side out of adjacent portions of the wire 140, at the outer peripheral side 130B.SELECTED DRAWING: Figure 2【課題】製造作業の煩雑化や製造コストの増加を抑えつつ、使用される手技の内容や用途に応じた所望の機能が付加されたガイドワイヤ、および各種の医療器具に利用可能な医療用コイルを提供する。【解決手段】ガイドワイヤ100のコイル部130は、内周側130Aと外周側130Bを形成しており、かつ、コア部の軸方向に沿う断面において、線材140の隣接する部分のうち基端側に位置する一の部分150と、線材140の隣接する部分のうち先端側に位置する他の部分160とが外周側130Bで重なり合って形成された少なくとも一つの重なり部170を有している。【選択図】図2
