Abstract: A yarn guide needle has a simple construction, is capable of being operated for swing motion and lapping motion, of accurately guiding a yarn to a desired position regardless of the type or the tension of the yarn and of being driven by a simple driving mechanism. The yarn guide needle has an upper flat portion and a lower flat portion twisted relative to each other, and the yarn guide needle is supported for turning by a pivot pin attached to the upper flat portion on a pair of support plate obliquely extending relative to the row of needles. Therefore, when the yarn guide needle is turned on the pivot pin, the lower flat portion moves in a plane oblique to the row of needles for lapping motion and a guide hole formed in the lower end of the lower flat portion is shifted transversely. Since the yarn guide needle need not be bent for lapping motion, the yarn guide needle may be formed of a firm, rigid plate.