PROBLEM TO BE SOLVED: To appropriately cut excitation light having different wavelengths for fluorescent emission of a plurality of fluorescent substances, and to suppress reduction of light intensity of fluorescence emission by a subject regardless of which fluorescent substance is fluorescently emitted. Improves the visibility of the image. SOLUTION: An endoscopic system has a first excitation light having a wavelength in a first predetermined range of an invisible light band and a second excitation having a wavelength in a second predetermined range in the invisible light band with respect to a subject. A light source that emits light, an optical filter that blocks light having wavelengths in the first predetermined range and a second predetermined range, and an optical filter that is arranged on the exit side of the optical filter and of the first excitation light and the second excitation light. It includes a sensor unit that generates an captured image of a subject that is excited by each of them and emits fluorescent light, and an output unit that outputs an captured image of the subject to a monitor. [Selection diagram] FIG. 8【課題】複数の蛍光物質を蛍光発光させるためのそれぞれ異なる波長の励起光を適切にカットし、いずれの蛍光物質を蛍光発光させる場合でも被写体による蛍光発光の光強度の低減を抑制して蛍光発光した画像の視認性を向上する。【解決手段】内視鏡システムは、被写体に対して、非可視光帯域の第１所定範囲の波長を有する第１励起光と、非可視光帯域の第２所定範囲の波長を有する第２励起光とを出射する光源と、第１所定範囲および第２所定範囲の波長のそれぞれを有する光を遮断する光学フィルタと、光学フィルタの出射側に配置され、第１励起光および第２励起光のそれぞれにより励起されて蛍光発光した被写体の撮像画像を生成するセンサ部と、被写体の撮像画像をモニタに出力する出力部と、を備える。【選択図】図８
