This thesis is for the analysis of EEG-changes the toss or spike at a volley ball game, we can estimate the process of change in the action-potential of nerve cells in the celebral cortex, this process has three parts-EEGs at rest, in Motion, and recovering. 7 person of subject is like the following that EEG test is three times, measurement position is Frontal, cental parietal, occipital. The results of this study are as follows. 1. Alpha wave distinguished high under stable EEG. 2. EEG of Eye ball bling seem to Bata wave. 3. EEG of playing Toss distinguished Atlas and Abnormal wave in Frontal position. 4. EEG of cental is small sharp spike on times during the Toss 5. Parietal, occipital is low wave during Toss play 6. Wave that playing strong spike motion changes muscle contraction.