PURPOSE: To obtain a spinning nozzle capable of efficiently producing an uniform product of fine-denier multifilament yarn in good process condition.

CONSTITUTION: Inlet holes 12 are engraved in a groove-like shape and ≥144 total outlet holes 11 are bored and arranged in arrangement of straight lines of two rows to one groove-like inlet hole 12, at intervals (b) of ≥1.0mm on each line and ≤3.0mm in the direction perpendicular to the straight lines and simultaneously at intervals (c) between adjacent inlet holes of ≥4.0mm and in ≥6/cm2 average outlet hole-arranging density. Thereby cooling air can be selectively allowed to flow through the intervals (c) without resistance. As a result, a product having excellent quality is stably obtained with reduced oscillation of spun yarn.