To provide a yarn winder that surely captures a yarn supplied from a yarn feeder without performing a precise control and the other.

A fine spinning machine (a yarn feeder) comprises a spinning device 9, a doffing truck 4 and a capturing guide 47. The spinning device 9 supplies a yarn 10. The doffing truck 4 comprises a capturing part 51 coming in and out of contact with the spinning device 9 and capturing the yarn 10 supplied from the spinning device 9 when approaching the spinning device 9, and is provided independently of the spinning device 9. The capturing guide 47 performs the positioning of the capturing part 51 such that the capturing part 51 is positioned into a predetermined capturing position for capturing the yarn 10 when the capturing part 51 approaches the spinning device 9.