An aluminum pin-tube heater for a greenhouse is provided to maximize the heating efficiency of the greenhouse and facilitate the installation and management of the heater. An aluminum pin-tube heater(100) for a greenhouse comprises: a cylindrical main body(2) which has a built-in infrared ray sheath heater; and a heat-radiating pin(3) which is installed on the circumferential surface of the main body to enlarge a heat-radiation area. The main body and the heat-radiating pin are made of aluminum in one body. The heat-radiating pin in the form of a rectangular plate having the same length as the main body is perpendicularly projected at fixed distances on the circumferential surface of the main body. The infrared ray sheath heater is supported by an eccentric washer fixed to both ends of the main body and installed eccentrically to the lower side of the main body. Main body covers(5) are separably installed at both ends of the main body.
