To provide a bioinformation measuring instrument capable of continuously and correctly storing bioinformation such as body temperature, blood pressure and blood glucose levels in time series at correct dates and times.

This bioinformation measuring instrument is provided with a bioinformation storage means storing bioinformation along with date/time information, a current date/time information setting means setting current date/time information, a current date/time information storage means periodically storing the current date/time information, and a current date/time information confirmation means confirming the reliability of the current date/time information stored by the current date/time information storage means; and is characterized in that, when the current date/time information confirmation means confirms that the stored current date/time are not correct, automatically starts the current date/time information settings.

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