The subject innovation relates to a car geupbaljin protection, to fit the vaporization of the fuel ratio flowing into the engine 20 by the operation of the accelerator pedal 30 of the driver, it is formed having a predetermined width and size, a body center is air inlet of the inner end portion, and the rotation shaft throttle body 10 and the throttle body 10, a 13, a shaft support of the air inflow groove 11 is formed, the air introducing groove 11 groove the shaft support the rotation shaft 13 formed on the inner end of 11 of the pivot shaft once for selectively opening and closing the air introducing groove 11 by the rotation of the 13 copper plate 40, the accelerator pedal 30 by rotating the rotating copper plate (40) provided in the air inflow groove 11 according to the degree of pressure so as to adjust the flow of air, in the body on one side it is fixed and the wire 60 extending from the accelerator pedal 30, accelerator pedal ( 30) the rotary plate 51 is rotated by the operation is provided in, into the rear side of the rotary plate 51 is once Plate 40 geolrimdae (52 of the rotary part 50, and the rotation unit 50 is fixed to the rotation shaft 13 of the geolrimdae 52 is formed in the throttle body 10 to prevent the opened and closed over a certain angle ) are formed on the rear side, after the operation of the accelerator pedal 30 of the driver rotation unit 50 are restored geolrimdae in being comprised of a return spring 70 which is provided to control the inflow amount of the air, the rotating portion 50 52, the upper and the geolrimdae 52 is restored and then rotated once copper plate 40. the air entered the groove 11 of the body, the throttle valve 5, the throttle body 10 in which the upper portion of geolrimdae 52 position since the configuration of the detection means 80 to allow only take a start up if there is blocking, or be achieved by long-term use a car to facilitate the restoration of the rotating copper plate 40, foreign matter in the return spring 70, such as inflow is not copper and time 40 is completely cut off the air inflow groove 11 If you would to avoid the accident car geupbaljin a sudden air flow. Therefore, it is very useful designed to enhance the credibility of merchantability and fitness for a driver.