The present invention provides an imaging device comprising: an image pickup device which picks up an object, an image acquisition device which continuously acquires image signals indicating the object via the image pickup device, a face recognition device which continuously recognizes the face of the object at predetermined time intervals from the continuously acquired image signals, a tracking indication device which indicates to keep track of the face of the object, a prediction device which predicts the position of the face of the object after a predetermined time elapsed since the tracking indication device indicated tracking based on a plurality of pieces of information about the position of the continuously recognized face of the object and the time intervals of recognizing the face, and a notification device which notifies a user of the predicted position of the face of the object.