To process missed-thread without failure by securely dissociating the missed-thread from the thrum with the minimum length of weft yarn when a failure is happened in pick insertion process.

The missed-thread 3 concerning the pick insertion failure is hole in the state connecting to the weft 2 in the main nozzle 1 for pick insertion when the failure is happened, after the stoppage of the loom, pick the missed- thread 3 from the thrum, supplying weft 2 which has the length required for removing treatment of the missed-thread 30 to the opening, spraying multiple sub-nozzles 9 placed along the flying pass of the weft 2, making the missed- thread 3 to reach to a missed-thread pick off mean 11 (stretch nozzle 11) while stripping off the missed-thread from the thrum in U shape, removing the missed- thread 3 from the opening by the pick up force of the missed-thread pick off mean 11.