Management data for managing an image sensing device can be read from the device even after the device has been mounted. To accomplish this, the management data is recorded in a non-effective imaging zone that surrounds an effective imaging area in the read-out area of the image sensing device. The non-effective imaging zone is a zone from which an output signal is not used in generating a sensed target image. The management data can be sensed from the signal output by the image sensing device. In another aspect, management data for managing an image sensing device can be read from the device even after the device has been mounted on a circuit board. To accomplish this, the management data is recorded on a protective glass, which covers the device, using an ink that reflects infrared radiation. A target image having a uniform pattern is sensed using a light source whose emission includes infrared radiation, and the image obtained by such sensing is displayed on a display. The portion of the obtained target image that is the management data appears darker than other portions. The management data is obtained by reading the darkened portion.