Abstract: The object of the present invention is to provide a radar receiver that can steadily and reliably detect the target in the close zone without largely complicating the construction compared to the conventional radar apparatuses. The radar receiver according to the present invention comprises a receiving unit 15 that detects or modulates a received wave for detecting a target, the received wave arriving from the target in response to a transmitting wave transmitted towards the target, and a control unit 19 that sets a gain of the receiving unit 15 to a value at which the receiving unit is prevented from falling into a saturation region by a component of the transmission wave that wraps around the receiving unit 15 through an aerial system used for transmission of the transmission wave during a period in which the transmission wave is being transmitted.