a noise eliminator comprises : a noise detection unit for detecting the pulsed noise mixed in a reception signal , and detecting the period of occurrence of the pulsed noise ; a detuning frequency detection unit for detecting an adjacent interference signal superimposed on the reception signal , and detecting a detuning frequency between the frequency of the adjacent interference signal and the frequency of a desired signal ; a gate control unit for calculating a period approximated to the period of occurrence of the pulsed noise as a gate period , the gate period being an integer multiple of the period equivalent to a reciprocal of the detuning frequency ; and a gate unit for interrupting the pulsed noise mixed in the reception signal during the gate period , thereby outputting a reception signal of which pulsed noise is eliminated . thus , the noise eliminator can reduce the effect of spurious signal ascribable to an adjacent interference signal .