A filling machine provided with a filling amount weighing apparatus which is used in a step of preparing medical supplies and so on, and continuously fills automatically powder, liquid or the like of a very small amount into a container such as vial, ampul or the like so as to weigh the filling amount, on the employment of an electronic balance to effect a weighing operation of high speed and precision so as to improve the filling amount accuracy through the reduction in dispersion in the filling amount.
