A reading device comprising: a visible light source configured to irradiate a subject with light having a visible wavelength; an invisible light source configured to irradiate the subject with light having an invisible wavelength; a first image sensor configured to receive reflected light from the subject being irradiated with the light having the visible wavelength and the light having the invisible wavelength, to generate visible image data containing a first invisible component; a second image sensor configured to receive the reflected light from the subject being irradiated with the light having the visible wavelength and the light having the invisible wavelength, to generate invisible image data of a second invisible component different from the first invisible component; an invisible component removal unit configured to remove the first invisible component contained in the visible image data using the invisible image data; and a coefficient generation unit, wherein the invisible component removal unit is configured to multiply the invisible image data with a correction coefficient, characterized in that: the coefficient generation unit is configured to generate said -m correction coefficient that absorbs an individual variation in removal of the first invisible component contained in the visible image data, based on the visible image data and the invisible image data together serving as correction coefficient generation image data, wherein the coefficient generation unit is configured to generate the correction coefficient that corrects the first invisible component to match the second invisible component, wherein the coefficient generation unit is configured to generate the correction coefficient from image data obtained by reading the subject irradiated with the light having the invisible wavelength emitted from the invisible light source; and the reading device further comprises a reference member to be read by the first image sensor and the second image sensor, wherein the coefficient generation unit is configured to generate the correction coefficient from image data obtained by reading the reference member as the subject. a visible light source configured to irradiate a subject with light having a visible wavelength; an invisible light source configured to irradiate the subject with light having an invisible wavelength; a first image sensor configured to receive reflected light from the subject being irradiated with the light having the visible wavelength and the light having the invisible wavelength, to generate visible image data containing a first invisible component; a second image sensor configured to receive the reflected light from the subject being irradiated with the light having the visible wavelength and the light having the invisible wavelength, to generate invisible image data of a second invisible component different from the first invisible component; an invisible component removal unit configured to remove the first invisible component contained in the visible image data using the invisible image data; and a coefficient generation unit, wherein the invisible component removal unit is configured to multiply the invisible image data with a correction coefficient, characterized in that: the coefficient generation unit is configured to generate said -m correction coefficient that absorbs an individual variation in removal of the first invisible component contained in the visible image data, based on the visible image data and the invisible image data together serving as correction coefficient generation image data, wherein the coefficient generation unit is configured to generate the correction coefficient that corrects the first invisible component to match the second invisible component, wherein the coefficient generation unit is configured to generate the correction coefficient from image data obtained by reading the subject irradiated with the light having the invisible wavelength emitted from the invisible light source; and the reading device further comprises a reference member to be read by the first image sensor and the second image sensor, wherein the coefficient generation unit is configured to generate the correction coefficient from image data obtained by reading the reference member as the subject. the coefficient generation unit is configured to generate said -m correction coefficient that absorbs an individual variation in removal of the first invisible component contained in the visible image data, based on the visible image data and the invisible image data together serving as correction coefficient generation image data, wherein the coefficient generation unit is configured to generate the correction coefficient that corrects the first invisible component to match the second invisible component, wherein the coefficient generation unit is configured to generate the correction coefficient from image data obtained by reading the subject irradiated with the light having the invisible wavelength emitted from the invisible light source; and the reading device further comprises a reference member to be read by the first image sensor and the second image sensor, wherein the coefficient generation unit is configured to generate the correction coefficient from image data obtained by reading the reference member as the subject.