Abstract: A fluorescence endoscope includes an illuminating light projecting system which projects illuminating light onto a part inside a body, a first objective optical system which causes the illuminating light reflected at the part of the body to form a normal image of the part, an excitation light projecting system which projects onto a part inside the body excitation light, and a second objective optical system which causes fluorescence emitted from the part to form a fluorescence image. A normal image CCD takes the image formed by the objective optical system and outputs a normal image signal representing the normal image and a fluorescence image CCD takes the fluorescence image formed by the second objective optical system and outputs a fluorescence image signal representing the fluorescence image. A measuring light projecting system projects measuring light at a wavelength in the wavelength range of the fluorescence onto a part inside the body.