PURPOSE: To improve measuring accuracy of a load cell by using the same circuits in the load cell as those of the prior art and adding a correction circuit to the outside so that dirft is adequately compensated even for an abrupt change in temp.

CONSTITUTION: A temp. detecting terminal 9 which takes out the forward voltage Ep of an internal diode as a temp. detecting signal is provided in a load cell 1. On the other hand, the extent that the temp. detection voltage Ep changes in certain time is calculated to calculate dθ/dt and the drift amt. ΔV that arises according to dθ/dt is measured by the preliminary experiment. The relation ΔV=f(dθ/dt) is preliminarily made and the above-mentioned voltage is converted to the drift amt. ΔV by a function generating circuit 11 which makes ΔV=f(dθ/ dt) with respect to the output dθ/dt of a differentiating circuit 10. Said value is added as the correction rate for the output 6 to the output V of the load cell 1 by an amplifier 12 by which the said output is corrected.