A blowing device comprising: a first blowing unit configured to suck air from upper space thereof and to discharge air in a lower lateral direction; and a second blowing unit disposed below the first blowing unit to suck air from lower space thereof and to discharge air in an upper lateral direction, characterized in that the first blowing unit and the second blowing unit are rotatable about a central axis thereof to adjust a direction of discharged air, wherein the first blowing unit includes: a first suction part disposed at an upper portion of the first blowing unit and having formed therein a first suction opening , through which air is sucked; a first flow generator disposed below the first suction part and having a first fan configured to generate air flow of the sucked air by rotation; a first rotation discharging part rotatably connected to the first flow generator to guide air flowing by the first flow generator and to discharge the air downward, the first rotation discharging part being configured to rotate in a circumferential direction, wherein a first discharging port is formed at the first rotation discharging part , the first discharging port having a width defined in the circumferential direction to guide discharge of air; and a first flow changing part disposed below the first rotation discharging part to change flow of the air discharged from the first rotation discharging part to the lower lateral direction. a first blowing unit configured to suck air from upper space thereof and to discharge air in a lower lateral direction; and a second blowing unit disposed below the first blowing unit to suck air from lower space thereof and to discharge air in an upper lateral direction, characterized in that the first blowing unit and the second blowing unit are rotatable about a central axis thereof to adjust a direction of discharged air, wherein the first blowing unit includes: a first suction part disposed at an upper portion of the first blowing unit and having formed therein a first suction opening , through which air is sucked; a first flow generator disposed below the first suction part and having a first fan configured to generate air flow of the sucked air by rotation; a first rotation discharging part rotatably connected to the first flow generator to guide air flowing by the first flow generator and to discharge the air downward, the first rotation discharging part being configured to rotate in a circumferential direction, wherein a first discharging port is formed at the first rotation discharging part , the first discharging port having a width defined in the circumferential direction to guide discharge of air; and a first flow changing part disposed below the first rotation discharging part to change flow of the air discharged from the first rotation discharging part to the lower lateral direction. a first suction part disposed at an upper portion of the first blowing unit and having formed therein a first suction opening , through which air is sucked; a first flow generator disposed below the first suction part and having a first fan configured to generate air flow of the sucked air by rotation; a first rotation discharging part rotatably connected to the first flow generator to guide air flowing by the first flow generator and to discharge the air downward, the first rotation discharging part being configured to rotate in a circumferential direction, wherein a first discharging port is formed at the first rotation discharging part , the first discharging port having a width defined in the circumferential direction to guide discharge of air; and a first flow changing part disposed below the first rotation discharging part to change flow of the air discharged from the first rotation discharging part to the lower lateral direction. <EOS>