Vertical wind direction control device of the group changmunhyeong air conditioner according to the present invention is installed on the inside of the discharge port 12 and the discharge port 12 formed in the front panel 10 up and down the flow of air passing through the discharge port 12 in groups a changmunhyeong air conditioner with the with the horizontal blade portion (50) for adjusting, the vertical wind direction adjusting means for vertically swinging the horizontal blade portion 50, the vertical wind direction adjusting means, at the rear side of the front panel 10 motor 61, and is connected to the shaft 62 of the motor 61. in addition, the cam 63 and the cam 63 and the horizontal blade to vary the height rotated by receiving power of the motor 61 provided and a portion connecting (50) and also the connecting member 70 to swing in one direction, a horizontal blade portion 50, while raising operation in accordance with the inclination angle of the cam 63, the horizontal blade portion 50 and the front panel (10) the connections and also the horizontal blade by the said connecting member (70) Since 50 is the swing is characterized by consisting of an elastic member 80 to swing the horizontal blade portion 50 in the opposite direction by the release when its tensile strength in one direction, in use when operating the horizontal blade portion 50 the only can be given for convenience, will in the flow of air to be discharged to widen the range of the discharge by the self-leveling blade unit 50 that is swung can be continuously dispersed uniformly in the vertical direction.