Field vibration test of Tsurumi Tsubasa Bridge, whose main span is the longest in the world among the single plane supported cable stayed bridges, was executed. Identification of the dynamic characteristics such as natural frequency, vibrational mode, modal damping, was done by different methods and the accuracy of identified values was first discussed. Then the dynamic characteristics of Tsurumi Tsubasa Bridge were investigated in comparison with those of other cable stayed bridges. It was found that the modal damping is higher and the natural frequency is lower compared with other cable stayed bridges whose main span is close to this bridge's.