PURPOSE: A far-infrared ray lamp for the plant cultivation is provided to enable users to easily control the direction of a heating wire if necessary, and to prevent a coating of the wore from separating from the wire by the heat of the lamp. CONSTITUTION: A far-infrared ray lamp for the plant cultivation includes the following: heat-radiating lamp fixing units fixed to both sides of the lamp; a reflecting plate fixed in between a heat-radiating lamp and the heat-radiating lamp fixing units, with one end fixed to the inside of a reflector for reflecting the heat generated from the heat-radiating lamp; a fixing piece(20) with the lower side fixed to the upper side of the reflector, including fastening holes on both upper sides; a supporter(30) with both lower sides rotatably combined to the fastening holes on the upper side of the fixing piece using fastening units(31) including bolts and nuts; an insulating socket(40) fixed to the upper side of the supporter; and a ground socket(50) connected to wires on both
