A device for guiding a yarn which is unwound from the front end of a yarn supply drum (2) of a yarn feeder unit for looms, which device comprises a hollow body, which is disposed co-axially and in line with the yarn supply drum, wherein the hollow body (7) has a larger diameter at its entry side facing towards the drum (2) than at its exit side facing away from the drum, and wherein the hollow body includes a first axial zone adjoining the entry side and a second axial zone adjoining the exit side, and wherein the hollow body has an outlet eye (10) at its exit side, wherein one or more axially spaced-apart, inwardly projecting ribs (11), which each lie in a separate plane extending transversely to the central axis of the hollow body, are present at least on the internal surface of the outlet eye (10) and possibly also of said second zone. |