A site to be observed, such as a lesion, is easily observed by means of bright fluorescence images without increasing the output of a light source. Provided is a fluorescence imaging apparatus (1) including a wideband excitation portion (7) that radiates wideband excitation light capable of exciting a plurality of fluorescent substances contained in a subject (A) a narrow-band excitation portion (8) that radiates narrow-band excitation light capable of exciting at least one fluorescent substance among the fluorescent substances an excitation-band switching unit (9) that performs switching between the wideband excitation portion (7) and the narrow-band excitation portion (8) and a fluorescence detector (15) having a detection wavelength band enabling detection of any kind of fluorescence from the subject (A) caused by the wideband excitation light and the narrow-band excitation light.
