It is said that synchronized phenomena which is observed in various field of mechanical system,biological system and chemical system and so on has to do with human communication,a craze.And the various researches about synchronized phenomena have been conducted with metronomes observed this phenomena easily.We observed synchronized phenomena changing parameters of distance between metronomes and places,and analyzed effect which ones give strength of union.The result suggested a possibility that a scale of effect is “distance > places”.Moreover,old observing method by CCD cameras cannot observe displacement of a medium which connect metronomes,however we succeeded the detailed observation by motion capture system and proved the validity of this observing method.