A UV ray fluorescence color detection device for detecting a fluorescence color emitted from a medium and received by a light receiving portion when a UV light is emitted from a UV light source to the medium, the UV ray fluorescence color detection device comprising: a white LED light source for emitting a white light by emitting a fluorescence from a phosphor; a plurality of pixels provided in the light receiving portion, each pixel having a plurality of light receiving elements, for receiving a light passing through at least one red color filter, at least one green color filter and at least one blue color filter in each pixel; and a correction processor for correcting a color balance of an output signal from each of the light receiving elements obtained when the UV light is emitted from the UV light source and a fluorescence is emitted from the medium and enters into each of the plurality of light receiving elements through the visible light color filter, based on normalized RGB color output ratios for the pixels calculated from an output signal from each of the light receiving elements obtained when the white light is emitted from the white LED light source, illuminates a white reference object, is emitted from the white reference object and enters into each of the plurality of light receiving elements of each pixel through the RGB color filters; wherein the correction processor is configured to calculate each normalized RGB color output ratio from values of the signal intensity corresponding to RGB colors obtained with the white light in each pixel and divided by a smallest value of the signal intensity corresponding to RGB colors obtained with the white light in the pixel; wherein such corrected output signal of the light receiving elements is used to discriminate the medium. a white LED light source for emitting a white light by emitting a fluorescence from a phosphor; a plurality of pixels provided in the light receiving portion, each pixel having a plurality of light receiving elements, for receiving a light passing through at least one red color filter, at least one green color filter and at least one blue color filter in each pixel; and a correction processor for correcting a color balance of an output signal from each of the light receiving elements obtained when the UV light is emitted from the UV light source and a fluorescence is emitted from the medium and enters into each of the plurality of light receiving elements through the visible light color filter, based on normalized RGB color output ratios for the pixels calculated from an output signal from each of the light receiving elements obtained when the white light is emitted from the white LED light source, illuminates a white reference object, is emitted from the white reference object and enters into each of the plurality of light receiving elements of each pixel through the RGB color filters; wherein the correction processor is configured to calculate each normalized RGB color output ratio from values of the signal intensity corresponding to RGB colors obtained with the white light in each pixel and divided by a smallest value of the signal intensity corresponding to RGB colors obtained with the white light in the pixel; wherein such corrected output signal of the light receiving elements is used to discriminate the medium.