The endoscope apparatus 1 to a subject, a light source device 4 for irradiating the at least one illumination light having a predetermined wavelength band, the return light from the subject based on the irradiation of the illumination light from the light source device 4 After imaging and CCD2 for imaging, by CCD2 and between the wavelength band in the minimum value of the wavelength band including the maximum value in the absorption characteristics of the living tissue, a first image of a first wavelength band with a peak wavelength of the spectral characteristics and includes an image processing unit 101 for outputting a signal P1, the observation monitor 5 for displaying an image based on the first image signal.内視鏡装置1は、被検体に対し、所定の波長帯域を有する少なくとも1つ以上の照明光を照射する光源装置4と、光源装置4からの照明光の照射に基づく被検体からの戻り光を撮像するCCD2と、CCD2による撮像後、生体組織の吸収特性において極大値を含む波長帯域から極小値における波長帯域の間で、分光特性のピーク波長を有する第1の波長帯域の第1の画像信号P1を出力する画像処理部101と、第1の画像信号に基づき画像表示を行う観察モニタ5と、を備える。
