Spectroscopic device

Patent Pending PROBLEM TO BE SOLVED: To provide a wavelength variable filter spectroscopic device which is preferably applied to medical equipment such as an endoscope. ; SOLUTION: The wavelength variable filter spectroscopic device is equipped with a wavelength variable filter 15 inside an imaging lens system 5 receiving light from a part to be observed 4 and comprising a plurality of lenses, and a spectral image formed by transmitting received light through the wavelength variable filter is formed on a solid state imaging device 6 by the imaging lens system, and successively output from the solid state imaging device.