where the lower surface of the horizontal part 11 is in abutment with the stopper 14 and the distal end of the holding part 13 is positioned between the stationary blade 40 and the press plate 50 if the upper thread is cut by an automatic thread cutting device 81 installed under a base plate after a sewing operation the first solenoid 20 operates immediately to raise the rod 22 fig2 and the left end of the horizontal part 11 of the holding member 10 thus the holding member 10 rotates about the screw 62 in the clockwise direction and the holding part 13 is moved from the waiting position to the holding position where the holding part 13 is positioned under a needle a the rotation angle of the holding member 10 is limited by the engagement of the inclined plane 11a of the horizontal part 11 with the stopper 27 after this energization of the first solenoid 20 is stopped and the rod 22 is returned to its home position by the expansion force of the spring 25 during this time the driving member 31 of the second solenoid 30 separates from the holding member as shown in fig2 with the above mentioned operation the holding part 13 goes back to the waiting position from the holding position at this time the hook of.