A fluoroscopy apparatus comprising: an illumination portion provided with a light source that is adapted to radiate illumination light and excitation light; a fluorescence imaging unit that is adapted to acquire a fluorescence image by imaging fluorescence generated at an subject; a return-light imaging unit that is adapted to acquire a reference image by imaging return light returning from the subject; and an image-correcting unit that is adapted to correct the fluorescence image acquired by the fluorescence imaging unit by using the reference image imaged by the return-light imaging unit, characterized in that the image-correcting unit is adapted to perform the following processing: FL revised = FL after / RL after 1 / x, where FL revised is a luminance value of the corrected fluorescence image, FL after = A × FL before x, RL after = B × RL before y, FL before and RL before are luminance values of the acquired fluorescence image and reference image, A and B are constants, x: y = c: a - m = d: b - n a is a value obtained by applying a power approximation to a characteristic of luminance versus distance from the illumination portion to the subject, for the fluorescence image obtained by the fluorescence imaging unit when excitation light of a predetermined intensity is radiated toward the subject, b is a value obtained by applying a power approximation to a characteristic of luminance versus cosine from the illumination portion to the subject, for the fluorescence image obtained by the fluorescence imaging unit when excitation light of a predetermined intensity is radiated toward the subject, c is a value obtained by applying a power approximation to a characteristic of luminance versus distance from the illumination portion to the subject, for the reference image obtained by the return-light imaging unit when illumination light of a predetermined intensity is radiated toward the subject, d is a value obtained by applying a power approximation to a characteristic of luminance versus cosine from the illumination portion to the subject, for the reference image obtained by the return-light imaging unit when illumination light of a predetermined intensity is radiated toward the subject, r D m • r θ n ≤ 1 + e max r D = D max / D min, r θ = cos θ min / cos θ max, D max is a presumed maximum observation distance, D min is a presumed minimum observation distance, θ max is a presumed maximum observation angle, θ min is a presumed minimum observation angle (where, 0° ≤ θ min < θ max ≤ 90°), m and n are arbitrary constants that satisfy Expression and Expression, e max is FL after / RL after max ÷ FL after / RL after min - 1, (FL after /RL after) max is a maximum value within a range from the presumed minimum observation distance to the presumed maximum observation distance and within a range from the presumed minimum observation angle to the presumed maximum observation angle, and (FL after /RL after) min is a minimum value within a range from the presumed minimum observation distance to the presumed maximum observation distance and within a range from the presumed minimum observation angle to the presumed maximum observation angle. an illumination portion provided with a light source that is adapted to radiate illumination light and excitation light; a fluorescence imaging unit that is adapted to acquire a fluorescence image by imaging fluorescence generated at an subject; a return-light imaging unit that is adapted to acquire a reference image by imaging return light returning from the subject; and an image-correcting unit that is adapted to correct the fluorescence image acquired by the fluorescence imaging unit by using the reference image imaged by the return-light imaging unit,