Apparatus for automatically adjusting optical axis of vehicle headlights

In a vehicle headlight optical axis adjusting apparatus, inter-vehicle distance (D1, D2, D3) in each of divided zones (Z1, Z2, Z3) is detected by a laser radar device (40). Desired optical axis raising angles (&thetas;H1, &thetas;H2, &thetas;H3) for a vehicle headlight (30) are calculated based on these inter-vehicle distances of the divided zones. The optical axis of the headlight (30) is adjusted to the most downward pointing angle selected from among these angles, so that the preceding vehicle is not blinded by dazzling.