PURPOSE: To enable the accurate measurement of the individual weight of the object to be measured even if the weights are distributed over a wide range by providing a specific discrimination means in addition to a means for receiving a signal transmitted from a transmission means attached to the object and a means for recording the stationary weight of the object.

CONSTITUTION: Time series data of the measured values of an object to be measured passing on a weighing table 1 are stored in a memory means 6a by the aid of an antenna 4 used as a means for receiving a signal emitted from a signal emitting means T attached to the object. The stationary weight of the object is calculated from the time series data by an operation means 6b and stored in an individual data memory means 6d as an individual data corresponding to the individual body discrimination information. The discrimination means 6c judges the calculated stationary weight as the correct data when the calculated stationary data falls within a prescribed range set based on the individual data corresponding to the individual discrimination information in the individual data stored in the memory means 6d.