Disclosed is an accident/near-miss factor area specifying device capable of specifying accident/near-miss factor areas, the presentation of which is highly required. The accident/near-miss factor area specifying device (100) is used for specifying accident/near-miss factor areas which a driver of a vehicle should be aware of in order to prevent an accident, and the device comprises a viewing area specifying unit (151) for specifying a viewing area of a driver of a vehicle which had a near-miss, immediately before the near-miss occurs, and an unnoticed area specifying unit (152) wherein, when a near-miss object is located in a viewing area, an area corresponding to the position of the object is treated as an unnoticed area which is one of the accident/near-miss factor areas.