Abstract: A head light structure of a car, including a protective housing consisting of a front and a rear housing, and a tail section consisting of a hollow tail end rearward extending from the rear housing and an elliptic cover. A leaf spring is disposed in the elliptic cover. A waterproof washer is disposed on a bottom of the elliptic cover for preventing external water from flowing to the wires or bulb in the elliptic cover. The elliptic cover is associated with the tail end of the rear housing by means of pressing the elliptic cover toward the tail end to be latched therewith with the leaf spring biased against a seat of a bulb to fix the same. The front housing is disposed with two inner pad ears each having a thread hole.