An optical filter for a display device in which color of a screen of a display panel of the display device shifts as a watching angle at which a viewer watches the screen increases, the optical filter, comprising: a background layer; and a pattern of grooves formed up to a predetermined thickness in the background layer, the grooves being spaced apart from each other in plan-view, characterized in that each groove has a first partial area and a second partial area in cross-sectional view corresponding to respective first and second sub-volumes of each groove, wherein each groove contains a light-absorbing material and a light-diffusing material, the light-absorbing material including a green wavelength-absorbing material that absorbs green wavelengths of light from 510nm to 560nm, the green wavelength-absorbing material being such that, when only the green wavelength-absorbing material without the light-diffusing material is contained in the grooves, (v'60 - v'0)/(u'60 - u'0) ranges from tan (15°) to tan (45°), where u'0 and v'0 are color coordinate values of the optical filter measured at a watching angle of 0°, and u'60 and v'60 are color coordinate values of the optical filter measured at a watching angle of 60°, and the light-diffusing material including light-diffusing beads, wherein among the first and second sub-volumes only the first sub-volume contains the light-absorbing material, and only the second sub-volume contains the light-diffusing material, and whereby the two sub-volumes of each groove have different light absorptivities and light diffusivities. a background layer; and a pattern of grooves formed up to a predetermined thickness in the background layer, the grooves being spaced apart from each other in plan-view, characterized in that each groove has a first partial area and a second partial area in cross-sectional view corresponding to respective first and second sub-volumes of each groove, wherein each groove contains a light-absorbing material and a light-diffusing material, the light-absorbing material including a green wavelength-absorbing material that absorbs green wavelengths of light from 510nm to 560nm, the green wavelength-absorbing material being such that, when only the green wavelength-absorbing material without the light-diffusing material is contained in the grooves, (v'60 - v'0)/(u'60 - u'0) ranges from tan (15°) to tan (45°), where u'0 and v'0 are color coordinate values of the optical filter measured at a watching angle of 0°, and u'60 and v'60 are color coordinate values of the optical filter measured at a watching angle of 60°, and a green wavelength-absorbing material that absorbs green wavelengths of light from 510nm to 560nm, the green wavelength-absorbing material being such that, when only the green wavelength-absorbing material without the light-diffusing material is contained in the grooves, (v'60 - v'0)/(u'60 - u'0) ranges from tan (15°) to tan (45°), where u'0 and v'0 are color coordinate values of the optical filter measured at a watching angle of 0°, and u'60 and v'60 are color coordinate values of the optical filter measured at a watching angle of 60°, and the green wavelength-absorbing material being such that, when only the green wavelength-absorbing material without the light-diffusing material is contained in the grooves, (v'60 - v'0)/(u'60 - u'0) ranges from tan (15°) to tan (45°), where u'0 and v'0 are color coordinate values of the optical filter measured at a watching angle of 0°, and u'60 and v'60 are color coordinate values of the optical filter measured at a watching angle of 60°, and the light-diffusing material including light-diffusing beads, wherein among the first and second sub-volumes only the first sub-volume contains the light-absorbing material, and only the second sub-volume contains the light-diffusing material, and whereby the two sub-volumes of each groove have different light absorptivities and light diffusivities.