A receiver (200) that receives a radio signal transmitted from a transmitter includes a receiving unit (2042) that receives a signal that is wirelessly transmitted from the transmitter at one of a plurality of transmission frequencies, a receiving frequency change determining unit (2048) that determines whether a receiving frequency is to be changed, based on the signal received by the receiving unit, and a communication error acceptance time setting unit (2046) that sets an acceptance time as a period of time for which communication errors after confirmation of a receiving operation are accepted, based on the signal received by the receiving unit. The communication error acceptance time setting unit sets the acceptance time to different periods of time, depending on whether the receiving frequency change determining unit determines that the receiving frequency is to be changed.