PURPOSE: To enhance the reliability of material testing data by the certain monitoring and the automatic correction of load, by controlling load correction and correction display by comparing a set load peak value and an actual load peak value.

CONSTITUTION: The load input output comparing means 5 of the automatic correcting part 2 of a load output monitoring and automatically correcting apparatus 1 compares the set load peak value signal stored in a load output memory means 4 and an actual load peak value signal due to a material testing machine 12 through an A/D converter 11. As the result, when the necessity of correction is discriminated, a load output correcting means 6 calculates a load correcting value to automatically correct the load signal outputted to the testing machine 12 from the means 4. At the same time, the necessity of correction is displayed by the correction display means 8 of a load monitor part 3 through the means 5 and it is easily ascertained that an error out of a tolerant range is generated between the set load peak value and the actual load peak value. By this constitution, a certain monitoring and the automatic correction of load are performed to enhance the reliability of material testing data.