A spectrometry device includes a wavelength variable interference filter; a filter driving unit which sets a wavelength of light which is output from the wavelength variable interference filter, and outputs at least red light and green light among three color light beams of predetermined red light in a red color wavelength range, predetermined green light in a green light wavelength range, and predetermined blue light in a blue light wavelength range in a predetermined order; an imaging element which receives at least red light and green light which are output from the wavelength variable interference filter, and obtains at least a red image and a green image among three color images; and an image generation unit which generates a composite image using the latest color images including at least the obtained red image and green image.