An image processing device rearranges image signal output in a different order from a spatial order of photosensitive elements to be in the order of the photosensitive elements. A logical value output of a flip-flop is switched each time a line start signal is input. As a third selector switch is connected to the flip-flop, it is also switched following this behavior, by which region or lower half region of a whole memory region of a RAM for pixel data values is specified each time a pulse is output from a line start signal generator. While the image pixel data values for one line are being written in a half region of the whole memory region of the RAM, the pixel data values for the previous line are read from the other half region of the memory region in accordance with an order predetermined by counted value conversion circuitry.