To provide a yarn-feeding unit that can reduce the fluctuation of the knitting yarn tension in a weft knitting machine that is caused by the movement of yarn-feeding position as much as possible and permits the production of knitted fabric of high quality.

This yarn-feeding unit 100 is equipped with a tension device and a clew detector to guide the knitting yarn pulled out of the yarn feed package in the longitudinal direction of the weft knitting machine 10. Two or more tension devices are integrated in parallel, a single clew detector that commonly works for individual tension devices is attached to constitute the objective yarn-feeding unit. The knitting machine is provided with at least one yarn-feeding unit so that the total number of the tension devices may become equal to that of the yarn-feeding lines and one or more of yarn-feeding units are arranged near the midsection of the weft knitting machine.