the upper side and an ultrasonic wave cutter 11a on the lower side are located slightly shifted from each other in the core wire direction the ultrasonic wave cutters 11a are moved in a direction perpendicular to the core wire thereby performing the cutting of the jacket 2 and the shields 3 as described above since the upper and lower ultrasonic wave cutters 11a are located slightly shifted from to each other a stair portion is formed in a cut portion of the jacket 2 and in a cut portion of a shield 3 next as shown in fig8 b the electrically conductive adhesive 7 is coated on the above described stair portion by a fixed quantity with the use of the dispenser as shown in fig3 the shield 3 in the cut portion lies in a state in which the lower half still remains on account of this the electrically conductive adhesive 7 penetrates into an inner side of the shield 3 thus bonding the grounding core wire 4 and the shield 3 furthermore in this state as shown in fig8 c an ultrasonic wave vibration of 40 khz is exerted on the grounding core wire 4 with the use of the ultrasonic wave vibrator 20 this ultrasonic wave vibration causes the electrically conductive adhesive 7 to penetrate between the grounding core wire 4 and the shield 3 ever more deeply thus making it possible to embody a secure connection between the grounding core wire 4 and the shield 3 also the ultrasonic wave.