<p>A production device of carbon nanotube in which the yield is enhanced. On the inside of a reaction tube (20) which is heated to become a circumference heating body, a plurality of nozzles (26) for supplying material and carrier gas into the reaction tube, and at least one internal heating body (24) are arranged. The yield is increased by arranging a plurality of nozzles. The nozzles are arranged to be held between the two heating bodies (the circumference heating body, the internal heating body) and the shortest distance to the circumferential wall of the two heating bodies is "a". The distance between adjoining nozzles is "b" (=2a). The flows of material and carrier gas supplied from the nozzle neither interfere with each other nor with the wall of the heating body and thereby the yield is increased.</p>
