PURPOSE: To provide a printed circuit board dividing machine which does not use any press die solely devoted, can cut even along a curved line, is versatile, and presents possibility of automating of the operation.

CONSTITUTION: A printed circuit board dividing machine is composed of an upper cutter 1 which is rotatably equipped at the tip with a small dia. disc-form cutting edge 1, is movable vertically, and with which a specified pressure can be impressed, a lower cutter 2 which is equipped at the tip with a disc-form cutting edge 32 in similar arrangement in such a manner as confronting the upper cutter 1, and an X-Y table 5 where a printed circuit board 4 is secured and which moves a cutting line 44 while in contact with the tip of the lower cutter 2 in accordance with a control program, wherein the upper cutter 1 sinks, contacts the cutting line 44 of the board 4, and cuts it while a specified pressure is impressed. Further it is so constituted that the upper and lower cutters 1, 2 make axial rotation along the cutting line 44 of the board 4, or so configured that a lower cutter 22 is equipped at the tip with a small spherical surface or a small rotatable sphere in lien of disc-form cutting edge 32 and that an ultrasonic vibratory energizing means 8 is furnished to apply a micro- vibration in vertical direction to either of the upper cutter 1 or lower cutter 22.