Abstract: A circular knitting machine having a thread guide fixed to the machine is formed with a thread insertion slot, and a plurality of thread guiding eyes holding threads for insertion. A thread entrainment element is located below the thread guide, travelling synchronously with the progression of movement of the needles between idle and knitting position. The thread entrainment element has a segment projecting radially under the thread guide means, and formed with an inwardly, rearwardly inclined guide surface to entrain and insert threads held by the eyes on the thread guide means into the thread insertion slot when the respective eyes are in working position.