VEHICLE HEADLIGHT DEVICE

A vehicle headlight device including a low-beam lamp and a high-beam lamp that emit light into a first light distribution region that is in front of a vehicle, and a patterned-light emitter that emits light into a second light distribution region in an illumination pattern in which bright regions and dark regions alternately repeat, the second light distribution region being further toward an outer side than the first light distribution region in a width direction of the vehicle. The patterned-light emitter emits light such that at least part of a region of the illumination pattern has a movement that is different from other regions of the illumination pattern.