Patent ID: 7762962

Claim:
A guide wire comprising; an elongated wire body and a coil covering at least a distal portion of the elongated wire body; the elongated wire body comprising a first wire member and a second wire member that are coaxially positioned relative to one another; the first wire member being made of a metal material; the second wire member being made of a metal material having a composition different from the composition of the metal material forming the first wire member; the coil being made of a metal material having a composition different from the composition of the metal material forming the first wire member; an intermediate member disposed either between the first wire member and the second wire member and connecting the first and second wire members to each other, or between the first wire member and the coil and connecting the coil to the first wire member; the intermediate member comprising at least one of Pd, Pt, Rb, Ir and Ta; the metal material forming the first wire member containing at least one of Ti and Cr as a principal component; the metal material forming the second wire member containing at least one of Ti an Cr as a principal component; the intermediate member containing a metal having an ionization tendency higher than that of Ti and Cr; the metal having the ionization tendency higher than that of Ti and Cr is Mg; and wherein a content of magnesium in the intermediate member is approximately 87 atom % to 99.9 atom %.