To provide a receiver capable of accurately demodulating reception signals.

This receiver for processing the reception signals including main signals modulated by a modulation system selected from the plural modulation systems and modulation system indication signals modulated by a prescribed modulation system for indicating the modulation system of the main signals is provided with a modulation system decision part 107 for generating modulation system decision signals for indicating the modulation system indicated by effective modulation system indication signals as the modulation system for the main signals if the effective modulation system indication signals are obtained and for indicating the modulation system selected with the highest probability among the plural modulation systems as the modulation system for the main signals if the effective modulation system indication signals are not obtained, and a demodulation part 99 for demodulating the main signals and the modulation system indication signals and generating demodulation signals, based on the modulation system indicated by the modulation system decision signals.