Abstract: There were cases about price monopoly related to copyright in United States, Japan and European Community. These cases involved five aspects. Horizontal price restrictions in batch reserving of films in United States were usually judged to be illegal. Horizontal price restrictions in copyright collective stewardship have undergone the process of being negated to being tolerated. Longitudinal price restrictions related to copyright were usually judged to be illegal. The excessively high copyright royalty and price dumping about copyright were rare. Price discriminations related to copyright were also rare and they were remitted in some exceptions. To summarize regular pattern in verdicts of court of various countries and their reasons by researching these cases may provides references to our future antimonopoly governing on intellectual property.