Provided is a driving support device including a storage device and a hardware processor, the hardware processor executing a program stored in the storage device to: acquire, from a mobile object, information on existence of a specific situation on a planned travel route, which is set as a route to a destination set by an occupant of the mobile object; plan a coaching item, including notification of warning information relating to traveling of the mobile object and suggestion relating to traveling of the mobile object, based at least on the information; and control a notification device so as to execute the notification and suggestion based on the planed coaching item.