To provide a method for accurately forming a passing hole by an extra fine steel wire and surely fixing the extra fine steel wire to a needle main body.

The method is composed of the bending process of bending the extra fine steel wire 1 in a chevron shape by clamping a part to be the circular arc part 1a and forming two arm pieces 1b, the proximity process of clamping an inner core tool 2 at the circular arc part 1a, bending both arm pieces further in the direction of approaching each other and bringing the tip parts 1c of both arm pieces close, the clamping process of clamping the tip parts of both arm pieces by a clamping tool 3 comprising an upper member 3a and a lower member 3b, the winding process of turning at least one of the inner core tool 2 and the clamping tool 3 for the required number of times with a virtual axis M-M passing through the middle point of the circular arc part 1a and the middle part of the tip part as a center axis, winding both arm pieces each other and forming the passing hole 1e and a winding part 1d, the cutting process of cutting the winding part 1d of a partially fabricated item for which the winding process is completed into a required length and then the fixing process of fitting the winding part 1d to a fitting hole 4b formed at the head part 4a of a needle main body 4 and fixing it.