The endoscope apparatus is disposed on the optical axis of the return light from the subject, and splits the first wavelength band including the visible light wavelength band so as to be incident on the imaging element for white light observation. A spectral part that splits a second wavelength band other than the wavelength band of the light and emits the light in a direction different from the direction of the optical axis； and the return part disposed on the optical axis between the subject and the spectral part First excitation for emitting the return light in a wavelength band other than the wavelength band blocked by blocking the wavelength band of at least one of the first and second excitation lights included in the light to the spectroscopic unit An optical cut filter, which is disposed on the optical axis of the light of the second wavelength band emitted from the spectroscopic unit and is not blocked by the first excitation light cut filter of the first and second excitation lights Block the wavelength band of the excitation light and the visible light Light in a wavelength band other than the blocking wavelength band； and a second excitation light cut filter that emitted to the imaging device for fluorescence observation.内視鏡装置は、被写体からの戻り光の光軸上に配置され、可視光の波長帯域を含む第１の波長帯域を分光して白色光観察用の撮像素子に入射させると共に、前記第１の波長帯域以外の第２の波長帯域を分光して前記光軸の方向とは異なる方向に出射する分光部と、前記被写体と前記分光部との間の前記光軸上に配置されて前記戻り光に含まれる第１及び第２の励起光のうちの少なくとも一方の励起光の波長帯域を阻止して阻止した波長帯域以外の波長帯域の前記戻り光を前記分光部に出射する第１の励起光カットフィルタと、前記分光部から出射された前記第２の波長帯域の光の光軸上に配置されて前記第１及び第２の励起光のうち前記第１の励起光カットフィルタによって阻止されない励起光の波長帯域及び前記可視光の波長帯域を阻止して阻止した波長帯域以外の波長帯域の光を蛍光観察用の撮像素子に出射する第２の励起光カットフィルタとを具備する。
