Disclosed is a FFC (flexible flat cable) having excellent heat dissipation effect, and light weight, and reduced cost. The FFC includes two insulating coating layers vertically spaced from each other, wherein each of the two insulating coating layers includes a polycyclohexane dimethylene terephthalate (PCT) film; a plurality of metal structures disposed between the two insulating coating layers and arranged horizontally and spaced apart from by a predetermined spacing; and an adhesive filled between the two insulating coating layers to fix the plurality of metal structures while surrounding the plurality of metal structures.