High frequency current application electrodes are brought into contact with both hands, both feet, etc., which are extreme parts of a body in order to apply current to the parts of the body to be measured. Potential difference measuring electrodes are brought into contact with the parts to be measured along the path of the high frequency current. High frequency current application electrodes and potential difference measuring electrodes are selected to select the path of the high frequency current and the path of the potential difference measurement in accordance with the purpose. Impedance on each of the parts of the body is measured and body composition is derived.
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