Abstract: An injury may develop to disease,then to disablement,and at last, to death.In a special case,it may stop at certain level.So in the case of injury compensation,one ought to distinguish carefully from one situation to another. When the forensic expert is intrusted in solving the problems of injury compensation and identifying the case of injury,he ought to determine carefully the causeeffect relationship between injury and disease or/and other consequences.That is to say,whether there is a causation or not.If there is,then the decision of the effectiveness of the cause is essential.The conclusion of examination of direct and in- direct relationship between injury and consequences forms a testimony at the court. In this paper,the relationship between causes and effects have been discussed.The conclusion is that,if there is a direct cause,the com- pensation rate is 100%;if there is no evidence of it,0%;and if there is/are indirect causes cut in between then,it depends on the effective- ness of direct cause and has the rate of 75%,50% or 25% respectively. The amount of damages follows Article 119 of the“General Rule of Civil Law”and other rules related.