Driving device for controlling weft ends

To provide a drive unit in a shuttleless loom, designed to prevent fold-back of the tip on the reach side of a weft picked during normal operation, namely a portion as weft ends, and pull a defective weft from the side opposite to yarn feed side so as to surely pull out the defective weft from the opening for warps. This drive unit works according to the following mechanism: a weft end control element 12 provided is such a mode as to be reciprocatingly movable by the action of an actuator 16 between the action position in weaving operation and the waiting position in pulling out a defective weft 3a, and during pulling the defective weft 3a by the action of a relevant device 14, the actuator 16 is driven by a controller 17 to move the weft end control element 12 from the action position in weaving operation to the waiting position in pulling out the defective weft 3a.