The present invention provides a device for identifying a tumor site in a subject, the device spectroscopically detecting fluorescence of protoporphyrins present in the tumor site,the protoporphyrins being protoporphyrin IX (PpIX) and photo-protoporphyrin (PPp), andthe device comprising:a light irradiation unit that converts part of PpIX into PPpa spectroscopy unit that separates PpIX fluorescence and PPp fluorescence:a spectroscopy detection unit that detects the relative fluorescence intensity of the PpIX fluorescence and the PPp fluorescence anda tumor discrimination unit that discriminates between the tumor site and a non-tumor site based on the relative fluorescence intensity of PpIX and PPp.
