A broadcast signal receiving apparatus, which is capable of simultaneously processing a plurality of transport streams in an appropriate manner, is comprised of: a pre-processing unit 1202 that determines and extracts a piece of viewing-related data from each of a plurality of transport streams; a multiplexing unit 1203 that multiplexes the extracted pieces of viewing-related data, and outputs the resulting multiplexed data to an adapter 1204; and a demultiplexing unit 1205 that obtains, from the adapter 1204, the multiplexed data processed by the adapter 1204, and demultiplexes the received data.