To provide an electric wire feeder capable of surely preventing an electric wire from meandering in the interior of a guide tube and accurately feeding the electric wire by a designated length.

In this electric wire feeder 11, when feed rollers 21, 22 of an electric wire feeding means 20 clamp a covered wire 2, compressed air is injected forward in the electric wire feeding direction along the outer peripheral surface of the covered wire 2 by a compressed air injecting means 50 to energize the covered wire 2 forward in the wire feeding direction. Thus, the covered wire 2 can be straightened so that the covered wire 2 can be accurately fed forward in the electric wire feeding direction only by rotating the paired feed rollers 21, 22 for a designated number of rotation.