A transmission method includes: generating a frame for transfer which stores one or more first internet protocol (IP) packets storing content, and one or more second IP packets, each including reference clock information which indicates a time for a playback of the content (S421); and transmitting the generated frame through broadcasting (S422). In the generating (S421), header compression is performed on the one or more first IP packets and the header compression is not performed on the one or more second IP packets.