A spectrometry device includes a wavelength variable interference filter, a filter driving unit, an imaging element which obtains color images corresponding to light with a red wavelength, light with a green wavelength, and light with a blue wavelength, respectively, and a composition unit which generates a composite image in which the red image, the green image, and the blue image are composited, the filter driving unit causes the wavelength variable filter to change the red wavelength every time when the red image is obtained, causes the wavelength variable filter to change the green wavelength every time when the green image is obtained, and causes the wavelength variable filter to change the blue wavelength every time when the blue image is obtained.