To provide an electronic balance capable of operating each mechanism at constantly at a fixed speed regardless of installed environmental temperature even if an inexpensive motor and its drive circuit are used as the actuator of a weight adding/eliminating mechanism and a weighing room door opening/ closing mechanism.

By using the output of a temperature sensor 10 for temperature compensation of a load detection signal and controlling its drive signal so that a motor 13 operates at nearly a constant speed regardless of the electronic balance installation environmental temperature, the speed of the motor 13 is maintained nearly constantly even if the load of the motor 13 changes due to the change in the viscosity of grease being applied, for example, to a deceleration mechanism due to temperature.