Vehicle lighting device and vehicle lamp

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 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 (0, 0), a center of the first light emitting element is located at (0, 0), 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.