In Arabic Language, in addition to the term "Ethics", the word "Adab" is also used in the sense of ethics. These two words became widespread after the advent of Islam. Being done through descriptive-analytical method, this paper studies the literal and applied concept of Ethics and Adab in Islamic culture through reviewing the related documents, references, articles and manuscripts. Then, based on the analysis of these concepts in Islamic culture, explains the relationship between them. The findings show that the subject of Ethics is ethical, but the subject of Adab is all subjects that right and wrong signify to them. Also, Ethics in terms of terminology and background of its application is a personal matter and observes individualist behavior. But Adab has been a social affair and the subject of community-based behaviors. In other words, the origin of Adab is the society, but the origin of Ethics is nature, and mood rooted in human nature, and in cases where Adab is related to Ethics, it finds a virtuous aspect and its aim is to engage the ethical act of human beings and to do the most correct ethical task.