PURPOSE: An air freshener of a vehicle for preventing a drowsy driving is provided to enhance a stimulating effect of an olfactory sense because a fragrant action is processed only in case that a drowsy driving is confirmed. CONSTITUTION: An air freshener of a vehicle for preventing a drowsy driving comprises a fragrant producing body(100), a drowsy driving sensing unit(200), a vibration sensor(300), and a controller(400). The fragrant producing body comprises an inclined plane, a plane for mounting an air freshener, and a finishing cover. A solar cell(S) is mounted on the inclined plane. A fan or pump(121) is installed in the middle of the plane for mounting an air freshener. The air fresheners are respectively installed in the left and right sides of the fan or pump. A switch(122) is installed to manually manipulate the fan or pump in the front side of the plane for mounting an air freshener. The finishing cover seals the plane for mounting an air freshener. A pair of opening/closing doors which opens/closes at the same time by wind pressure generated by the fan or pump is arranged in both sides of the finishing cover.본 발명은 태양에너지로부터 필요한 전원을 얻고, 특히 운전자의 눈 크기를 검출하여 졸음운전중인 것으로 판단되면 발향되게 함으로써, 구조가 간단하면서도 자체적으로 전원을 생성하여 이용하고, 졸음 운전으로 판단된 시기에만 발향되어 코를 자극하여 졸음방지 효과를 더욱 높일 수 있도록 한 차량의 졸음방지용 방향제 키트를 제공하는데 그 목적이 있다.
