(57) [summary] without compromising the internal ventilation of the [purpose] lamp body, I will provide a ventilation structure of the automotive headlamp was adapted to prevent fogging of the lens. And [configuration] lamp body 11, a lamp bulb 12, which is attached to the rear of the lamp body, a reflecting plate 13 is provided so as to surround the lamp bulb, a lens 14, which is mounted so as to close the front end of the lamp body, lamp and a vent pipe 15 and an open end attached to the top of the rear end of the body facing downwards, in the vicinity of the open end facing downwards in the ventilation pipe, to accommodate the plastic ball 17 within the ventilation pipe as well as the stopper 18 so that the ball will not fall off the lower side of the ball is provided, also small air holes 16a of diameter on the upper side of the ball which is hermetically closed by the ball And configured to be provided with a.
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