To provide a copper alloy wire having high electric conductivity and high bendability and suitably used for a conductor for robot driving cable, and its manufacturing method.

At the time of manufacturing a high conductivity and high bendability copper alloy wire composed of an in-situ formed chromium fiber reinforced copper or copper-alloy matrix composite and obtained by forming in-situ a chromium layer fiber in a copper or copper-alloy matrix, the surface of the wire is tin plated in a stage after the completion of required heat treatment and then heavy plastic working is applied to modify the plating layer.