To surely and rapidly feed a knitting yarn of each bobbin mounted on a creel stand through the interior of a tube and feed the knitting yarn to the side of the knitting machine according to simple operations.

This knitting yarn feeder is obtained by using a housing comprising an introduction chamber 15 and a lead-out chamber 16 for compressed air, supporting a jetting nozzle 23 with an elastic material 25 in the lead-out chamber 16, arranging a yarn guide 26 having an inserting and passing groove 28 bored therein in a close contact state on the jetting nozzle 23 and setting up the knitting yarn in the inserting and passing groove 28. The compressed air is jetted from the jetting nozzle 23 to feed a knitting yarn along the interior or a tube 33 so as to feed the knitting yarn to the side of a knitting machine.