An amplification control device for controlling a variable-gain amplifier the amplification factor of which is controlled based on an analog control signal, and which amplifies an analog input signal and outputs an analog output signal, includes component acquisition means that transforms, by the discrete Fourier transform, a digital output signal converted from the analog output signal into digital form by an A/D converter, thereby acquiring a desired frequency component of the digital output signal, differentiating means that acquires a difference between the electric power of the frequency component acquired by the component acquisition means and a target value of the electric power of the frequency component, and digital control signal output means that outputs a digital control signal, based on the difference acquired by the differentiating means, for controlling the amplification factor of the variable-gain amplifier, in which the analog control signal is obtained by converting the digital control signal into analog form by the D/A converter.