Abstract: A ribbon-like plate heat pipe comprises a ribbon-like plate having tunnels arranged parallel to each other and defined by partitions. The ribbon-like plate has both ends closed such that the tunnels are filled with melt metal up to a predetermined depth from each end of the ribbon-like plate upon welding or soldering. The partitions are alternately eliminated by a predetermined length in the vicinity of the ends of the ribbon-like plate so as to ensure communication of the tunnels with each other to form a serpentine container having a predetermined turns. The serpentine container is filled with a predetermined amount of working fluid.