A biological information detecting device includes: a pulse wave information measuring unit that measures pulse wave information of a subject an event determination unit that determines whether or not a syncope event including a sign of syncope and development of syncope has occurred in the subject based on the measured pulse wave information and a control unit that, when it is determined that the syncope event has occurred, performs at least one of storage processing of the pulse wave information at the time of the occurrence of the syncope event and the syncope event notification processing.
