To prevent the drop of a yarn from a yarn storage drum even in a case in which a consumption of a yarn wound on a yarn storage drum is variously different in a yarn feeder for textile machinery.

This yarn feeder for textile machinery has a yarn storage drum 13 to be driven and rotated around a vertical axis 39. The yarn storage drum 13 has a truncated conic yarn admission zone 26 and a cylindrical yarn storage zone 29. A yarn 21 is tangentially brought through a yarn feeding guide element 24 close to the yarn admission zone 26 and tangentially taken out from the yarn storage zone 29 by a yarn removing guide element 28. The yarn removing guide element 28 is arranged against the yarn storage zone 29 so as to take out the yarn 21 from a bottom edge 36 of the yarn storage zone 29 with leaving a certain vertical distance.