In order to improve the compression rate for configuration information including address information and data information when transmitting or storing configuration information which includes addresses and data having differing characteristics, an information compression device is provided with a compressor which receives as input and compresses the configuration information provided with the addresses and data, and a compressed information storage module for storing the configuration information which is compressed, that is, compressed configuration information, as the information to be decompressed for the user, said compressor including an information separating module for separating the configuration information into address information and data information, an address compressor and data compressor which separately compress the separated address information and data information, and a compressed information outputting module for combining the compressed address information and data information and outputting the result as compressed configuration information.