To provide a guide wire which achieves an excellence in straightness, deflectability, torque transmissivity, strength and rigidity along with an excellent resistance to kinking by improving the resistance to kinking of the guide wire made of a stainless steel and its production method.

A wire material made of austenite-based stainless steel is worked to stretch, thereby making a wire material with a prescribed diameter and strength. Then, after the correction for making it straight, the wire material is cut up to a prescribed length to form a bar material. Then, the bar material undergoes an age-treatment under the conditions of treatment 0.5 hour to 4 hours at 300-500C to finally produce a guide wire.