PURPOSE: To fill and weigh an object to be weighed at high speed and accurately.

CONSTITUTION: An object to be weighed whose amount is close to a required amount W0 is put primarily A into a container 3 which is moved at regular intervals and intermittently, and the primary amount Wa of objet is weighed primarily B. By making use of data obtained in a primary weighing operation, a small additional amount Wb (=W0-Wa) of object required for obtaining the required amount W0 of objet is additionally weighed and separated C in advance in a weighing hopper 4 through an additional weighing hopper 5. When the container 3 is moved further and reaches a station for an additional filling D, the additional amount Wb is put at once into the container 3 from the weighing hopper 4. Individual operations such as the main filling A, the main weighing B, the additional weighing and separation C and the additional filling D are performed simultaneously.