To provide a direct conversion receiver which has small intermodulation distortion and cross modulation distortion.

A generating means composed of a synthesizer 44 and a variable attenuator 45 generates a cancel signal, a composing means composed of a coupler 41 puts the cancel signal together with a received signal of the RF band, and a base-band converting means composed of mixers 14 and 15 converts the frequency of a received signal of the RF band after the composition to a base band by using a local oscillation frequency. In this case, a detecting means composed of a high-pass filter 42 and a detecting circuit 43 detects a disturbing wave signal from the received signal after the composition and a control means composed of a control part 46 controls the frequency, phase, and electric power of the cancel signal generated by the generating means so that the detected disturbing wave signal becomes small.