In a jet spinning device, in order to enable automatic transport of the yarn from a twist jet to an output roller pair which, for spin-technological reasons, is somewhat spaced from the twist jet, the twist jet is placed in flow communication with a pneumatic guide tube projecting up to the output roller pair. In order to enable automatic threading of the yarn or the like into the output roller pair, the opening or mouth of the guide tube is arranged so close to the output roller pair that the yarn is conveyed into the converging space of the output roller pair and is engaged or entrained thereby.