Abstract: A jet dyeing apparatus comprises a generally horizontal cylindrical high-pressure dyeing vessel having an outlet for a fabric standing portion at a front portion thereof, wherein the vessel is tilted slightly downward toward the direction of the front outlet, a liquid pan is provided at the lowest portion, a standing portion for the fabric is formed by a perforated pipe in the vessel in parallel therewith or being further tilted slightly downward toward the direction of the outlet so that the fabric and the dye liquor will smoothly flow therethrough while separated from each other. A circulation path for the fabric is formed by a liquor-injection portion and a transfer pipe installed on the upper side, and the dye liquor is circulated from the liquor pan into the liquor-injection portion by a circulation pump through a heat exchanger.