Since a civil case is dealt in civil courts, its PROCEEDING must be stopped until a final judgment is given on a criminal case that was filed before or during the PROCEEDING of the civil case. Is the rule "to stop a civil case by criminal case", is binding on a civil judge and the litigants of the civil lawsuits? Whether this rule has been established for the benefit of litigants or public interest? Legislators have made a civil judge obliged to stop the civil PROCEEDING until a final judgment in the criminal case. As such, the above rule is a supplement to "authoritative criminal order on civil case". Authors try to study the subject by dividing it into three parts: the first section deals about the basis of the aforementioned rule hence, shows reasons for the existence this rule and its relations with the public order. The second section speaks about a comparative condition, and regulation to file the criminal case and the unity of the facts in criminal and civil cases, and then deals about the necessity of the union of the litigants in criminal and civil lawsuits. The third section is an attempt to study the effects of this rule.