PURPOSE: To provide a farm working machine capable of turning right and left working machines in the same directions in interlocked state by the horizontal turning of either one of the right and left working machines, effective for improving the horizontal turning operability of the right and left working machines, free from loss of weight balance even by folding the right and left working machines 20 backward, having high stability and free from overturning danger.

CONSTITUTION: This farm working machine is provided with a machine frame 1 having a transmission 5 holding an input shaft 12 protruded forward and an output shaft 13 its both ends of which protruded in the right and left directions. The right and left working machines 20 having rotary working members 27 are connected to the right and left parts of the machine frame 1 through a vertical connection pin 19 in a state freely rotatable in horizontal direction and the rotary working members 27 are rotated by the output power of the output shaft 13 when projected from the right and left parts of the machine frame 1. An interlocking mechanism 48 having an interlocking member 35 is rotatably connected between the inner end parts of the right and left working machines 20. A working machine 20 is horizontally rotated interlocked with the motion of the other working machine 20 in the same direction around the connection pin 19 by the interlocking member 35.