loops in orthogonal relation to an obliquely inclined plane of opening of the needle thread loops so that a plurality of needle and looper threads are accurately caught into the hook portion and then carried along thereby for cutting in addition an arrangement is disclosed which enables the mounting of the thread cutting device without interferring with the movement of a looper even if the available space within the bed is very limited application_number US 4843087 A description one embodiment of the thread cutting device according to the invention will now be described as to the arrangement and functions thereof with reference to fig1 to 9 inclusive of the accompanying drawings in fig1 through 3 numeral 1 designates a support member having a thread cutter 2 at the front end thereof and provided with a slot 3 at a suitable spot therein in the slot 3 there is fitted a guide pin 4 consisting of a machine screw and the like which is fixed to a machine bed the rear end of the support member 1 is pivotably connected by a pin 6 to a free end 5a of a pivot link 5 accordingly the support member 1 is pivotally movable on the guide pin 4 between a standby position shown in fig1 and an operative position shown in fig2 and 3 as it is guided by the pivot link 5 a support.