It has been argued that mercy killing may cause other crimes. Such as organ trade or killing for heritages. Mercy killing has to be committed by good will to release patients from agony, but no standard can tell what good will is.? It is claimed that death should be natural. However, in our society, it is accepted that mercy killing can save payment of relatives. Especially in the poor family that hardly has enough money for food and also has hopeless patient on the same time. They have to choose mercy killing because they are poor. And it is intention of patients to die because they do not want to be a burden of their family. Moreover, organs from hopeless patients can be useful for others, but for using those organs, it has to be a permission of patient to donate it for others not permission of a doctor.