A head-up display device comprising: a light source unit; a liquid crystal panel of a vertical alignment, VA, type which transmits light from the light source unit; first and second TAC, triacetyl cellulose, films (12-1, 12-2) which sandwich the liquid crystal panel; first and second retardation plates (11-1, 11-2) which sandwich the first and second TAC films, each of the first and second retardation plates imparting retardation of a 1/4 wavelength; and first and second polarizers (10-1, 10-2) which sandwich the first and second retardation plates, wherein a line perpendicular to a display surface of the liquid crystal panel is inclined relative to a line perpendicular to a major light emitting surface of the light source unit, the liquid crystal panel includes a liquid crystal layer, the liquid crystal layer in an off-state being a positive C plate, each of the first and second TAC films (12-1, 12-2) is a negative C plate, the first and second polarizers (10-1, 10-2) include first and second absorption axes, respectively, which are substantially perpendicular to each other, the first and second retardation plates (11-1, 11-2) include first and second slow axes, respectively, which are substantially perpendicular to each other, the first and second slow axes intersect at about 45° with the first and second absorption axes, respectively, the first and second TAC films (12-1, 12-2) include third and fourth slow axes, respectively, which are substantially perpendicular to each other, each of the first and second TAC films (12-1, 12-2) has an out-of-plane retardation of 20 nm or more and 70 nm or less, and has an in-plane retardation of 7 nm or less, for a wavelength of 590 nm, each of the first and second retardation plates (11-1, 11-2) has an in-plane retardation of 130 nm or more and 150 nm or less, and has an N z coefficient of 1.4 or more and 1.7 or less, for a wavelength of 590 nm, and N z = n x − n z / n x − n y where n x is a refractive index in a slow axis direction, n y is a refractive index in a fast axis direction, and n z is a refractive index in an out-of-plane direction. a light source unit; a liquid crystal panel of a vertical alignment, VA, type which transmits light from the light source unit; first and second TAC, triacetyl cellulose, films (12-1, 12-2) which sandwich the liquid crystal panel; first and second retardation plates (11-1, 11-2) which sandwich the first and second TAC films, each of the first and second retardation plates imparting retardation of a 1/4 wavelength; and first and second polarizers (10-1, 10-2) which sandwich the first and second retardation plates, wherein a line perpendicular to a display surface of the liquid crystal panel is inclined relative to a line perpendicular to a major light emitting surface of the light source unit, the liquid crystal panel includes a liquid crystal layer, the liquid crystal layer in an off-state being a positive C plate, each of the first and second TAC films (12-1, 12-2) is a negative C plate, the first and second polarizers (10-1, 10-2) include first and second absorption axes, respectively, which are substantially perpendicular to each other, the first and second retardation plates (11-1, 11-2) include first and second slow axes, respectively, which are substantially perpendicular to each other, the first and second slow axes intersect at about 45° with the first and second absorption axes, respectively, the first and second TAC films (12-1, 12-2) include third and fourth slow axes, respectively, which are substantially perpendicular to each other, each of the first and second TAC films (12-1, 12-2) has an out-of-plane retardation of 20 nm or more and 70 nm or less, and has an in-plane retardation of 7 nm or less, for a wavelength of 590 nm, each of the first and second retardation plates (11-1, 11-2) has an in-plane retardation of 130 nm or more and 150 nm or less, and has an N z coefficient of 1.4 or more and 1.7 or less, for a wavelength of 590 nm, and N z = n x − n z / n x − n y where n x is a refractive index in a slow axis direction, n y is a refractive index in a fast axis direction, and n z is a refractive index in an out-of-plane direction.