1. A surveillance recorder comprising: a picture input unit for inputting a surveillance picture; a moving object detection unit for detecting a moving object from a surveillance picture inputted by the picture input unit; a face image detection unit for detecting, from the object detected by the moving object detection unit, a part having an elliptical outline as a face image; an identity judgment unit for judging whether the face image newly detected by the face image detection unit is the same person as a face image detected last time or not based on positions of each face image; a storage image choice unit for, when a newly detected face image has been judged to be of the same person by the identity judgment unit, choosing another face image from face image(s) of the same person stored in a recording medium and the newly detected face image; and an image storage unit for, when the newly detected face image has been chosen by the storage image choice unit, storing in the recording medium both the newly detected face image and information for searching for the newly detected face image together, wherein the identity judgment unit detects a direction of movement of face images detected one after another by the face image detection unit and, if having detected a change in a direction of movement, judges that the face image is of another person.