To provide a judgment method that can easily judge whether working condition as a hard beaming balancing machine is maintained or not in a balancing machine, especially the hard beaming balancing machine.

The balancing machine is provided with a centrifugal force generating device 3 on a bearing stand 2 supporting a rotor 6, which is structured that detects the vibration of the bearing stand 2 generated by rotating a weight 3c as known unbalance by the centrifugal force generating device 3 and judges the acceptance of a hard beaming type of balancing test.