Provided is an intraoral inspection apparatus for dental use capable of distinguishing and detecting more kinds of diseased sites etc. with one apparatus. The apparatus comprises: a light source unit provided with color-producing light sources capable of inducing fluorescent lights from diseased sites; a wavelength adjusting device provided with a first filter that transmits, among the fluorescent lights, a light having a wavelength of a fluorescent light from a predetermined diseased site and blocks or attenuates a light having a wavelength other than this, and provided with a second filter that transmits, among the fluorescent lights, a light having a wavelength of a fluorescent light from a diseased site different therefrom and blocks or attenuates a light having a wavelength other than this; and an imaging device which receives the fluorescent lights transmitted through the first filter and the second filter, and converts them into electrical signals.