Ethical scholars have divided ethics into two types including personal ethics and social ethics. How may one judge about the very division? What may be taken as the differences between the two? The views on the field are numerous. Some have viewed personal ethics as dealing person only or, in other words, personal ethics is the one whose interests is only for person not others. Again, regarding its assessment, personal ethics is divided into egoism and altruism. And religious teachings emphasizing altruist ethical values as helping other people, benevolence, kindness and mercy to thers have put the values of this ethics forward with regard to personal ethics. This paper has intended to assess the criteri in the field. it has been made clear that on the basis of monotheistic spirit of Islam, the value of the ultimate perfection and human happiness, social ethics is directed to a transcendent individualism in which all human social conducts and concerns would be justified. In this paper, on the basis of Islamic ethical teachings, more particularly the Quranic verses, five proofs of priority of personal ethics have been presented.