A radio transmitting/receiving device uses a channel interleaver with turbo codes serving as error-correcting codes to convert burst errors into random errors. The radio transmitting/receiving device, in Code Block Concatenation (15), when dividing a Transport Block into a plurality of Code Blocks, performs channel coding so that burst errors that occur during transmission are distributed to all the Code Blocks. Therefore, when burst errors occur, the errors can be uniformly distributed to all Code Blocks in a Transport Block so that no unevenness occurs in error resilience between the Code Blocks.