VEHICLE LIGHTING DEVICE AND VEHICLE LAMP

Provided are a vehicle lighting device (1) and a vehicle lamp (100) that can maintain lighting even when an input voltage drops. The vehicle lighting device according to an embodiment includes a socket (10); a substrate (23) provided on one end side of the socket; a first circuit (21) provided on the substrate; and a second circuit (22) provided on the substrate. The first circuit has a plurality of first light emitting elements (21a); and a control element (21c) electrically connected to the plurality of first light emitting elements and controlling a value of a current flowing through the plurality of first light emitting elements. The second circuit has second light emitting elements (22a) the number of which is smaller than the number of the plurality of first light emitting elements; and a resistor (22c) connected in series to the second light emitting elements.