Abstract: A method and arrangement for picking a weft thread by means of a weft thread inserting comb in a jet loom. The comb is composed of a plurality of juxtaposed comb members which are mounted on a reciprocating slay of the jet loom. Each comb member has a pair of shank portions which define a weft inserting opening and an unthreading channel. The comb members, when in their operative positions, define a weft inserting channel. At least one of the comb members has secondary carrying fluid conduit means which directs via an outlet a stream of a secondary carrying fluid into a zone of said weft inserting channel which is disposed below the axis of the channel relative to the unthreading channels of the comb.