Provided are a cover having a metallic grid structure and a method for manufacturing the cover. The cover includes a pattern portion formed of a metallic material, in which a plurality of patterns are independently disposed spaced apart from each other and an injection portion disposed between pattern portions to connect the pattern portions, the injection portion being formed of a non-metallic material. The method includes forming a pre-pattern portion including patterns in a regular or irregular form and a bridge connecting the patterns on a metallic plate, forming the injection portion on the pre-pattern portion by insert-injection or thermo-compression press, and removing the bridge.