To provide a transmission server, a transmission device and a reception device for digital broadcasting, and a program that efficiently enable data retransmission in response to a retransmission request from a receiving side using communication based on coded data of an error correction code used in digital broadcasting.SOLUTION: A transmission server 6 of the present invention is supplied with coded data of an error correction code related to digital broadcasting generated by a transmission device 2 (3), stores the coded data for a predetermined time, receives, through an IP network 8, a retransmission request packet generated when a reception device 5 cannot correct a bit error of the coded data, changes a coding rate of the coded data related to the retransmission request while determining, according to communication quality, whether the coding rate is to be increased or decreased, and re-transmits it to the reception device 5 by IP packet formation. The transmission device 2 (3) of the present invention sequentially outputs the coded data to the transmission server 6. The reception device 5 of the present invention repeats the retransmission request until decoding within a predetermined time by using the coded data obtained through the retransmission request.SELECTED DRAWING: Figure 1