A merchandise item registration apparatus includes: a left photoelectric sensor that senses an object in a first area located on one side of a recognition area for merchandise items in a merchandise item identification device; a right photoelectric sensor that senses the object in a second area located on the other side of the recognition area; and a camera that captures an image of the recognition area. A merchandise item is identified by sensing the object from the image of the recognition area captured by the camera, and a POS terminal is made to perform a merchandise item registration process or a provisional registration cancellation process in accordance with the temporal sequence of results of the sensing performed by the camera in the respective areas.