A thread feeder for sewing machines is disclosed which feeds the thread from one of the bobbins to an automatic threading machine. It includes a movable table over the sewing machine, bobbins mounted thereon, thread tension regulators for adjusting tension to the thread from the bobbin, and feed rollers for feeding the thread from the thread tension regulator to the automatic threading device on a sewing machine. By such an arrangement, threads of different color or material can be fed conveniently one after another in a desired order.