A spectroscopic analysis device configured to perform component analysis on a specimen by means of a reflection absorption spectrum of reflected light obtained by irradiating the specimen with light, the spectroscopic analysis device comprising: a light source configured to emit light for irradiating the specimen; a prism stuck to the specimen and configured to totally reflect the light emitted from the light source; a polarizing separation element; a wavelength dispersing element; an image capturing element; and a processing unit; characterized in that the polarizing separation element is configured to separate the light totally reflected by the prism into a first polarized light component and a second polarized light component that are orthogonal to each other; the wavelength dispersing element is configured to disperse respective wavelength components of the first polarized light component and the second polarized light component that are separated by the polarizing separation element; the image capturing element is configured to capture respective images of the first polarized light component and the second polarized light component that are dispersed by the wavelength dispersing element; the processing unit is configured to perform component analysis on the specimen by obtaining an absorbency at each wavelength by using an imaging signal output from the image capturing element; and. the spectroscopic analysis device further comprises: a trigonal prism between the polarizing separation element and the wavelength dispersing element, and configured to convert the first polarized light component and the second polarized light component that are separated by the polarizing separation element into collimated lights, and a slit between the trigonal prism and the wavelength dispersing element, and configured to transmit therethrough components of the collimated lights of the first polarized light component and the second polarized light component that are converted into the collimated lights by the trigonal prism to guide to the wavelength dispersing element. a light source configured to emit light for irradiating the specimen; a prism stuck to the specimen and configured to totally reflect the light emitted from the light source; a polarizing separation element; a wavelength dispersing element; an image capturing element; and a processing unit; characterized in that the polarizing separation element is configured to separate the light totally reflected by the prism into a first polarized light component and a second polarized light component that are orthogonal to each other; the wavelength dispersing element is configured to disperse respective wavelength components of the first polarized light component and the second polarized light component that are separated by the polarizing separation element; the image capturing element is configured to capture respective images of the first polarized light component and the second polarized light component that are dispersed by the wavelength dispersing element; the processing unit is configured to perform component analysis on the specimen by obtaining an absorbency at each wavelength by using an imaging signal output from the image capturing element; and. the spectroscopic analysis device further comprises: a trigonal prism between the polarizing separation element and the wavelength dispersing element, and configured to convert the first polarized light component and the second polarized light component that are separated by the polarizing separation element into collimated lights, and a slit between the trigonal prism and the wavelength dispersing element, and configured to transmit therethrough components of the collimated lights of the first polarized light component and the second polarized light component that are converted into the collimated lights by the trigonal prism to guide to the wavelength dispersing element. a trigonal prism between the polarizing separation element and the wavelength dispersing element, and configured to convert the first polarized light component and the second polarized light component that are separated by the polarizing separation element into collimated lights, and a slit between the trigonal prism and the wavelength dispersing element, and configured to transmit therethrough components of the collimated lights of the first polarized light component and the second polarized light component that are converted into the collimated lights by the trigonal prism to guide to the wavelength dispersing element.