PURPOSE: To provide a heating apparatus for a direct spinning and drawing process capable of easily designing physical values of yarns to be manufactured in a direct spinning and drawing process and having an improved productivity.

CONSTITUTION: This heating apparatus for a direct spinning and drawing process is provided with the following members A to C together: (A) a heating cylinder 4, which spun yarns pass through, has openings at the both ends and are placed between a spinneret and a pulling roller or a winder; (B) pressure detecting means 11, 11' for the yarn passing region in the heating cylinder; and (C) a pressure adjusting means 12, 12', 12" which compare the pressure values determined by the pressure detecting means 11, 11' with predetermined standard values and adjusts the pressures in the yarn passing region in the heating cylinder to the predetermined standard values.