Quantitative information of a subject is acquired. Provided is a fluorescence endoscope device (100) including a light source (10) that irradiates a subject with excitation light and white light an image generator (41) that acquires a fluorescence image by capturing fluorescence generated in the subject irradiated with the excitation light and that also acquires a white-light image by capturing return light returning from the subject irradiated with the white light an image corrector (43) that corrects the fluorescence image by using the white-light image acquired by the image generator (41) so as to generate a corrected fluorescence image a threshold-value setting unit (45) that sets a threshold value on the basis of an average value of gradation values of pixels in the corrected fluorescence image generated by the image corrector (43) an image adjuster (51) that increases the contrast in the corrected fluorescence image between an area having gradation values larger than the threshold value set by the threshold-value setting unit (45) and an area having gradation values smaller than the threshold value and a monitor (50) that displays the corrected fluorescence image whose contrast is increased by the image adjuster (51).
