PURPOSE: To improve operability by connecting a handle/mount member, having a movable wire holding means, to another end of a flexible pipe for guiding the end part of a wire from a wire reel in a housing.

CONSTITUTION: The end part of a wire 22 extracted from a replaceable wire cassette 10 is guided to a wire guiding flexible hollow pipe 20 to be fed to the position of a coupler/handle part 14, to be held in a nipple (connecting pipe) member 24 by a wire clamping rod. Then a pair of rollers 16 and 17 of a wire supplying means 11 moves between the opened and closed positions of the nipple member 24 by operating a latch handle 15, and concurrently when the coupler/handle member 14 of a cassette is joined into the means 11, the rod is disconnected to start the actuation of a stepper motor 40 on detecting this disconnection of the rod by a sensor 43, to sent some length of the wire 22 in order to a stitcher 13, thus operability and safety can be improved.