To promote heat transfer in saturated pool nucleate boiling, a one-screwed fin fitted with a flat plate was installed on a horizontally flat heating surface. As a result, the screw division on the heating surface supplied bubble nuclei, and flat plate on the top of the screwed fin contributed to the liquid-agitating effect of vapor bubbles. Through these effects, the nucleate boiling heat transfer coefficient of the heating surface with the one-screwed fin fitted with a flat plate was enhanced up to 5.8 times in comparison with that of a horizontally flat heating surface. Within the range of experimental conditions employed, a dimensionless arrangement was obtained for the saturated pool nucleate boiling heat transfer using the heating surface with one-screwed fin fitted with a flat plate.