Metal card capable of bidirectional communication and method for manufacturing metal card

A metal card formed by stacking and laminating a plurality of layers including a metal layer of an SUS material heat-treated to improve strength and tension, and adhesive layers of a size the same as that of the metal layer, an upper inlay layer having a first antenna formed thereon, and a lower inlay layer having a second antenna formed thereon, centered on the metal layer, wherein

• the metal card is manufactured by forming a COB accommodation space capable of accommodating a COB by milling a predetermined area of the metal card through a computerized numerical control (CNC) machining process, forming a through-hole exposing the first antenna and the second antenna through a process of milling a COB contact point area of the COB accommodation space as deep as the lower inlay layer, electrically connecting the first antenna and the second antenna by dispensing a conductive elastic liquid inside the through-hole, and bidirectionally connecting the first antenna and the second antenna to the COB by attaching the COB in the COB accommodation space so that COB contact points are connected by the conductive elastic liquid.