The purpose of this study is to investigate diabolo coaching behaviors in elementary school. The training process is videotaped and analyzed by Arizona State University Observational Instrument. The result is as follows: The coach has 368 coaching behaviors during 120 minutes training process. The most recurrent behaviors are management, concurrent-instruction, and praise. However, the least ones are uncodable, questioning, pre-instruction. We can conclude from the result that a diabolo coach, in order to have an effective training, has to manage the training process well and create a positive training environment. The most effective goal can be achieved by promoting learning. Skills with instruction, by increasing study motia1ion with praise, and by enhancing participation with encouragement.