A vehicle lighting device , comprising: a socket ; a substrate provided on one end portion side of the socket ; one first light emitting element provided on the substrate ; and four second light emitting elements provided on the substrate , wherein a square luminance distribution region orthogonal to a central axis of the vehicle lighting device is defined on light irradiation sides of the first light emitting element and the second light emitting elements ; a center of the luminance distribution region overlaps the central axis of the vehicle lighting device ; the vehicle lighting device being characterized in that the luminance distribution region is equally divided into four square first regions whose corners overlap the center of the luminance distribution region; each of the four first regions is equally divided into nine square second regions; a length of one side of the second region is 0.8 mm; when XY coordinates of the center of the luminance distribution region are , a center of the first light emitting element is located at , and centers of the four second light emitting elements are located at (0.8, 0.8), (-0.8, 0.8), (0.8, -0.8), (-0.8, -0.8); a luminance of the luminance distribution region is 90% or more of a total luminance of light emitted from the vehicle lighting device ; in twenty second regions arranged along sides of the luminance distribution region, a luminance of one of the second regions is 2% or less of the total luminance; and in sixteen second regions provided inside the twenty second regions, the luminance of one of the second regions is 3% or more and 10% or less of the total luminance. a socket ; a substrate provided on one end portion side of the socket ; one first light emitting element provided on the substrate ; and four second light emitting elements provided on the substrate , wherein a square luminance distribution region orthogonal to a central axis of the vehicle lighting device is defined on light irradiation sides of the first light emitting element and the second light emitting elements ; a center of the luminance distribution region overlaps the central axis of the vehicle lighting device ; the vehicle lighting device being characterized in that the luminance distribution region is equally divided into four square first regions whose corners overlap the center of the luminance distribution region; each of the four first regions is equally divided into nine square second regions; a length of one side of the second region is 0.8 mm; when XY coordinates of the center of the luminance distribution region are , a center of the first light emitting element is located at , and centers of the four second light emitting elements are located at (0.8, 0.8), (-0.8, 0.8), (0.8, -0.8), (-0.8, -0.8); a luminance of the luminance distribution region is 90% or more of a total luminance of light emitted from the vehicle lighting device ; in twenty second regions arranged along sides of the luminance distribution region, a luminance of one of the second regions is 2% or less of the total luminance; and in sixteen second regions provided inside the twenty second regions, the luminance of one of the second regions is 3% or more and 10% or less of the total luminance. <EOS>