Abstract: Yarn feeding apparatus for knitting machines, particularly for circular knitting machines, including a rotatable roller or wheel, on which a belt operates and presses thereon a yarn passing on an eye carried by a yarn inserting arm and a yarn outlet arm, such arms being movable between a position for holding the yarn between the belt and roller or wheel, and a position at which the yarn is thereby held out of contact with the belt. The apparatus includes an eye, positioned between the belt and outlet arm, which is continuously laterally displaced relative to the belt, and on which the yarn let out from the apparatus passes before passing on the outlet arm. Thus, the time required for discontinuing the yarn supply by the involved apparatus is considerably shortened.