A mobile electronic device (10) includes: waveform information acquisition part (17a) configured to add a time stamp to a waveform detected from a user and record the waveform with the time stamp as waveform information condition information acquisition part (17b) configured to add a time stamp to information indicating a condition of the user and record the information with the time stamp as condition information artifact waveform acquisition part (17c) configured to acquire, from artifact waveform data (16c) in which a condition and the artifact waveform are associated with each other and stored, an artifact waveform that corresponds a condition indicated by the condition information in the same time period as a time period of the waveform information waveform correction part (17d) configured to correct the waveform information using the artifact waveform and autonomic nerves diagnosis part (17e) configured to diagnose autonomic nerves of the user using the waveform information corrected by the waveform correction part.
