An imaging section images a subject to generate an image. A display displays an image. A measuring section measures the size of the subject on the basis of the image. A recording section associates calibration data of a measuring endoscope apparatus including a value obtained when the measuring section measures the size of the calibrator on the basis of an image obtained when the imaging section has imaged the calibrator, and calibration data of the calibrator including a value obtained when the calibrator is measured by a higher-rank measuring instrument of a traceability system, and a value obtained when the measuring section measures the size of a measurement object different from the calibrator on the basis of an image of the measurement object, with the image of the measurement object image and records the associated data on a recording medium.
