To provide a method of manufacturing a metal component for enabling precision work for high-grade component parts even when the geometric shape of the component is complicated and the workability of a component material is inferior.

In the method of manufacturing the metal component to be formed in a three-dimensional shape by cutting a material and/or deforming work for the material, precision work for one or more high-grade component parts is applied by electrochemical work using a nozzle-shaped cathode for releasing electrolyte into a working region, and the cathode or the metal component is freely moved in a space by a manipulator element.