To provide a recording device which supports to devices and electronic data for limitation of access, recording of operation history and measurement condition, and writing of signs, and can handle data as an official data.

In a measuring device that makes electronic data from predetermined input signals and records it into a recording medium as measured data, the device is provided with a measurement managing unit for generating management data for devices and measurement results prior to a measurement, a measurement file preparing unit for preparing a measurement file composed of the measurement results during the measurement and recording the file into the recording medium, and a sign-in unit for conducting electronic signature to this measurement file after the measurement.