An optical device for the headlight includes a left-hand drive optical element and a right-hand drive optical element. The left-hand drive optical element includes a left-hand drive light incident part and a left-hand drive transmission part which is arranged in the light emergent end region of the left-hand drive light incident part and extends in the light emergent direction; the light emergent end of the left-hand drive transmission part is provided with a left-hand drive cut-off part capable of forming a left-hand drive cut-off line. The right-hand drive optical element is similarly arranged. The disclosure further relates to the automotive lighting device including the optical device and the automobile including the automotive lighting device.