For slender and flexible tower, wind-induced vibration is usually concerned for evaluation of structural safety and occupant’s comfort. The Air Traffic Control tower of Suvanabhumi airport, the tallest ATC tower in the world, is approximately 140 m high with almost uniform, cylindrical cross section of reinforced concrete core having outside diameter of 8.3 m and 0.7 m thick. The Aeronautical Radio of Thailand Ltd. has been interested in monitoring the vibration of the tower to evaluate possible effects on structural safety and serviceability. ...