Cooling the single crystal device and a single crystal growing apparatus including the same

Embodiment relates to a single crystal growing apparatus including a single crystal and this cooling device. Cooling the single crystal device according to the embodiment may include a cooling unit main body; The cooling material in the passageway to move the inner wall and the outer wall of the cooling unit main body; And the coating layer to absorb the radiation heat to the inner wall surface of the cooling unit main body, and including, the coating layer may be a carbon nanotube coating layer.