A storage element with a cavity (40), wherein the cavity (40) is provided with a substantially flat shape and the transverse width between the sidewalls (41, 42) of the cavity (40) decreases slightly in the longitudinal direction (L) of the cavity (40) toward the outlet (22), so that the weft thread stored in the cavity (40) is prevented from moving in the cavity (40) in the direction toward the outlet (22). A device for feeding a weft thread to a weaving machine, weaving machine and a method for feeding a weft thread to a weaving machine.
