Vehicle headlamp mounted in potential impact region

The headlight case (5) has a rupture line (6a,6b,6c) between a first part (5a) of the fixed case (5) on the vehicle body and a second part (5b) of the box, such that, under the effect of an accident or shock, the casing splits along the rupture line and deforms by relative displacement of the second part of the box with respect to the first part. The glass (4) fixed on the first and second parts of the box also by flexion.