An image classifying device comprises: a pathway data input unit for inputting a plurality of pathway data, the pathway data including person information, pathway information that is continuous location information, date information and time information; an image data input unit for inputting image data which contains imaging date/time information; a pathway data comparison unit for comparing the pathway data; an event date/time decision unit for determining an occurrence of an event and the date/time of the event based on a comparison result; and an image data classifying unit for classifying image data containing the imaging date/time information corresponding to the determined date/time of event as event image corresponding to the determined date/time of the event, the event date/time decision unit determining the occurrence of event based on a difference in the location information corresponding to a time when the time information of the compared pathway data agree.