Organ transplantation is one of the new therapeutic techniques that has produced many scientific controversies. Lawyers and moralists have considered financial relations between donors and receivers and demonstrated several theories about it. Of course, organ sale should be investigated fundamentally. In the first place, it is necessary to show that there is an ownership or other relations such as possession between human and her own body parts. In the second stage we should consider the general conditions of trading accuracy to discuss finally about it. Of course, attention to ethical problems that arise in this field is very important, because the rules that are supported by ethics will be consistent. Therefore ethical rules play essential role in creating and analyzing legal regulations. Thus we should be careful about complying with ethics in this field to define legal condition of trading human body parts.