Abstract: A device for feeding yarn to a knitting machine comprises a yarn guide and a drive pulley with a yarn feeding roller, mounted on a shaft for rotating said shaft. The yarn feeding roller is defined by two discs being provided, each of said discs, on the side facing the interior of the yarn feeding roller, with slots arranged symmetrically in relation to a plane perpendicular to the rotation axis of the yarn feeding roller. An elastic band runs between the discs in the respective opposing slots and forms the yarn feeding surface of the roller with a variable diameter. Spaced from the yarn feeding roller and mounted in a stationary position in relation thereto is a yarn guide in the form of a rod having its upper portion disposed at an angle to the rotation axis of the yarn feeding roller, and its lower portion disposed parallel to this axis for steady guiding yarn loops along the yarn feeding surface of the roller with a variable diameter.