To provide a fluid jet type loom capable of detecting weft breakage even when one weft among a plurality of wefts is broken.

In this fluid jetting type loom 1 constituted so that a plurality of wefts 3 each fed from a plurality of yarn feeding bodies 2 to a weft length- measuring and weft-storing device 4 are simultaneously flown out from a nozzle 5 for weft inserting, sensors 7 for each detecting the plurality of wefts 3 are arranged between the yarn feeding bodies and the weft length-measuring and weft-storing device 4. Since wefts 3 are each detected between the yarn feeding bodies 2 and the weft length-measuring and weft-storing device 4, weft breakage can be detected even when one weft is broken.