A radiator with seamless heat conductor at least consists of two heat sink modules and a heat conductor. The two heat sink modules can be jointed with each other. At jointing edges of the heat sink modules, arc slots are provided corresponding to the heat conductor thereby forming penetrating holes after jointing the two heat sink module altogether. The heat conductor is made in one unity and is seamless provided with multiple directions. When assembling, the heat conductor is placed into the arc slot on one of the heat sink module before installing the other heat sink module thereby fixedly jointing the two heat sink modules with the heat conductor clipped therein, achieving the objective in making radiator with seamless heat conductor.