The present invention provides a calibration model. The fat model (50) comprises a plurality of fat materials (52) that simulate 100% fat. The thickness of each fat material (52) is different, and these are arranged in a stepped shape. The muscle model (70) includes a plurality of muscle materials (72) that simulate 100% muscle, having the same structure as the fat model (50). The two models can be used for correcting a plurality of body thicknesses in a correction test by using them in a parallel arrangement state. The two models can obtain a plurality of body thicknesses correction measurement values in once correction measurement by using them in a parallel arrangement state. In addition, by combining the step-shaped parts of the two models, the state of combining the two models can be easily achieved. The two models can obtain a plurality of body fat rate correction measurement values in once correction measurement by using them in a combined state.
