A moment calibrating apparatus (1) is provided with an elongated force transmitting member (6) for transmitting a force applied to the end portion thereof to a multi component force gauge (5) a load applying mechanism (7) for applying a load without changing the direction of the force along a direction perpendicular to said end portion and a calculation unit (8) for calculating a true moment free from the effect of a perpendicular load on the basis of the moment value around the axis in the direction orthogonal to the perpendicular direction measured by the multi component force gauge (5) under the condition that said perpendicular load along the direction perpendicular to said end portion is applied by the load applying mechanism (7) wherein a moment calibration of the multi component force gauge (5) is performed using said true moment calculated by the calculation unit (8).
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