There is an imaging apparatus including a noise suppression circuit. The noise suppression circuit includes sorting of one signal of a central pixel and four signals of peripheral pixels having the same color which are close to the central pixel in the image signals in order of magnitude, calculating of an average value from the one signal of the central pixel and the four signals of the peripheral pixels, calculating of a difference value from a maximum value and a minimum value of the one signal of the central pixel and the four signals of the peripheral pixels, comparing of the difference value with an assumed noise level, and substituting of the one signal of the central pixel by an average value of two or more pixel values excluding the maximum or minimum values when the first difference value is larger than the noise level.