PURPOSE: To decrease the end breakage of a yarn having low real twist in the ballooning stage, by forming a yarn-guide hole to the spindle, and attaching a yarn-accelerating and/or false-twisting nozzle slantly to the support rotating integrally with the spindle.

CONSTITUTION: The spindle 2 is funished with a yarn-guide hole 32 connected its one end with the pipe 4 and opening the other end at the side face of the spindle 2, and the support 35 is fixed in a manner rotatable integrally with the spindle 2. An air nozzle 34 having false-twisting function and yarn-accelerating function is attached near the folding point of the yarn, and an air nozzle 33 having false-twisting function is placed at the bent part of the yarn Y.