The invention relates to an air conditioner, in particular to a structure for manually orienting vertical wind-guiding vanes of indoor units of wall-mounted air conditioners, which solves the problemthat the prior vertical wind-guiding vane is not good in orientation. A technical scheme comprises wind-guiding-vane rotation shaft brackets which are arranged on the upper and lower parts of an exhaust port, vertical wind-guiding vanes which are arranged in shaft holes of the wind-guiding-vane rotation shaft brackets through rotation shafts, and a connecting bar which is connected with a direction-adjusting shaft of the vertical wind-guiding vanes through the shaft holes. The structure is characterized in that a shaft hole on the right side of the connecting bar and the side of a water-receiving plate is connected with a manual orienting knob of the vertical wind-guiding vanes through a shaft; two convex ridges matched with the water-receiving plate for orientation are designed on the wall of the water-receiving plate under the knob; and the orienting knob consists of a disk provided with a rotation shaft hole in the center, a handle formed at one end of the diameter of the disk, a plurality of protrusions formed under the periphery of the disk on the base part of the handle, and the vertical wind-guiding vanes formed at the other end of the diameter of the disk. The structure isused in the indoor units of the wall-mounted air conditioner to ensure accurate stable orientation of the vertical wind-guiding vanes.