A fluorescent image obtaining apparatus for obtaining as an image the data relating to the fluorescent light emitted from a measurement portion upon the irradiation thereof by an excitation light, wherein by amplifying only the intensity of the fluorescent light, the S/N ratio of the fluorescent image based thereon is improved, is provided. The statistical quantities of a fluorescent image obtained by a wide-band fluorescent image obtaining element and a narrow-band fluorescent image obtaining element are computed by a statistical quantity computing means. If the statistical quantity is smaller than a predetermined value, the magnification rate of the imaging optical system is controlled by a magnification rate control means so that the fluorescent image is reduced and focused on the wide-band fluorescent image obtaining element and the narrow-band fluorescent image obtaining element.