Weft insertion nozzle of fluid injection-type weaving machine

The present invention provides a weft insertion nozzle of a fluid injection-type weaving machine capable of optimizing the number of the rectifying grooves of a plurality of rectifying members of a weft-inserting nozzle and optimizing a space dimension between a rectifying fin on upstream side and a rectifying fin on downstream fin and a relationship between the number of a water supply hole and the number of rectifying grooves. The weft insertion nozzle of a fluid injection-type weaving machine comprises: a needle (1), a nozzle main body(2) containing a feed water hole(13) perforated into the hollow part and a circular channel (4) connected with the feed water hole(13) between the needle and the same; commutating elements(5,6) installed on the circular channel at regular intervals in order of direction advanced weft; and plural commutating paths (17, 30, 20) formed continuously in an axial direction, wherein numbers of each commutating paths of the first commutating member and the second commutating member a