A data storage controlling device has: a compression unit which performs lossless compression on each compression object region; determination means which determines whether or not the lossless compression is possible in each compression determination region including a plurality of compression object regions; and a storage control unit which performs storage control in each compression determination region in such a manner that data after the lossless compression in a compression determination region is stored as compressed data into a storage unit when it is determined that the lossless compression in each compression object region included in the certain compression determination region is possible, and image data before the lossless compression in the certain compression determination region is stored into the storage unit when it is determined that the lossless compression in each compression object region included in the certain compression determination region is impossible.