In a radio receiver including an aerial wire (1) that receives a radio signal in which a transmission signal is superimposed on a carrier, a (VCXO 2) that oscillates a local oscillation signal, a frequency multiplier (3), and a demodulation circuit that demodulates the transmission signal on the basis of the radio signal and the local oscillation signal, an oscillation frequency control circuit that repeatedly sweeps the frequency of the local oscillation signal over a frequency bandwidth that is equal to or more than the width of a frequency drift in a carrier frequency from the aerial wire (1) or over a frequency bandwidth that is equal to or more than the width of a frequency drift in the local oscillation signal is provided.