Lighting and/or signalling device for a vehicle

The device (1) has a carry-lamp (5) assembled at a headlight case (3) by a fixing unit (7) in a snap-fit manner. A seal is placed between the carry-lamp and the headlight case leveled with a contact interface. The carry-lamp includes a set of guidance units (9, 11) that co-acts with another set of guidance units (13, 15) complementary to the headlight case to direct movement of the carry-lamp along direction of the headlight case during assembling process. The carry-lamp is assembled on the headlight case in translatory movement according to direction of an assembly.