A copper has been industrial applied for various components and parts such as motors, coils, batteries of electric vehicles (EV) heat exchangers, and heat pipes, because of having excellent properties such as thermal conductivity and electrical conductivity. Besides the copper is expected to be used for handrails, doorknobs etc., which touched by many people to prevent from infectious diseases because of having an antibacterial property and a virus inactivation property. However, copper is low strength to only about 40% as strong as stainless steel. To add a new function of virus inactivation property to the surface keeping the strength, it is necessary to develop a coating technology to form a copper layer on the surface. Thus, we have employed a blue direct diode laser at a 445-nm wavelength for laser coating and developed a blue direct diode laser induced laser metal deposition system [B-LMD] called multi beam B-LMD. In this study, we demonstrate that a copper alloy layer is formed on a SUS304-type stainless with a 200-W class blue direct diode laser installed B-LMD.