A communication device includes a barrel shifter shifting an information sequence according to a code word number; an error correction coding circuit encoding the shifted information sequence to generate a code word; and a transmitter transmitting a frame with N rows and M columns in the order of the row numbers. One code word is disposed in a row of the frame. The row number of the frame corresponds to the code word number. When a code word number is N, the error correction coding circuit encodes an information sequence of a second size smaller than the first size and fixed data of a third size, which is the difference between the first size and the second size, and disposes them in a row of the frame such that the error correction parity follows the information sequence of the second size and the fixed data follows the error correction parity.