An endoscope apparatus having: excitation light-irradiating units (11, 12a, 12c) fluorescent image-acquiring units (12b, 13a, 13b) a storage unit (13d1) for fluorescence spectra at standard fluorescent component concentrations and standard exposure conditions a fluorescent component concentration-calculating unit (13d2) an image-compositing unit (13d3) that generates, assigns colors and composites distribution images from the fluorescent component concentrations and an image display unit (14) and when a1(λ1) - am(λn) are the coefficients for the wavelengths λ1 - λn of the fluorescent components 1 - m obtained from the fluorescence spectra in the storage unit and Iall(λ1) - Iall(λn) are the intensities of the fluorescent images at wavelengths λ1 - λn acquired by the acquiring unit, the concentration-calculating unit calculates the concentrations D1 - Dm of the fluorescent components 1-m using Equation wherein, coupled with a modification in the numerical value of an element configuring the exposure conditions during fluorescent image acquisition at wavelength λx, the concentration-calculating unit modifies the coefficients a1(λx) - am(λx) at wavelength λx during calculation of the concentrations D1 - Dm using the ratio of the post-modification numerical value to the numerical value under standard exposure conditions for the element configuring the exposure conditions.La présente invention concerne un appareil dendoscopie comprenant : des unités irradiant une lumière dexcitation (11, 12a, 12c) des unités denregistrement des images obtenues par fluorescence (12b, 13a, 13b) une unité de stockage (13d1) des spectres de fluorescence obtenus pour des concentrations standards des composants fluorescents et dans des conditions dexposition standards une unité de calcul de la concentration du composant fluorescent (13d2) une unité de composition des images (13d3) générant, affectant les couleurs et composant les images de distribution des concentrations des composants fluoresc
