An information-transmitting apparatus for transmitting data records, each comprised of a plurality of data words (column data items), each word comprising a plurality of digits, wherein data words of a data record are compared with the next successive record which is also comprised of a plurality of data words. Each data word of a first record is compared on a digit-by-digit basis with the corresponding data word of a second record, and various digits of the data words of the second record which are identical with those of the corresponding data words of the first record are omitted. Deletion of identical digits of a data word of a second record is continued until a non-coincidence detection signal is produced. Then, the remainder of the digits of the data word of the second record are transmitted. Additionally, special codes which separate the data words and which separate the records are also transmitted.