The objectives of this study were as follows. 1) To study the concept of self-awareness in Buddhist Ethics. 2) To analyze self-awareness in Buddhist Ethics. This study was documentary research that studied documents, textbooks, and Buddhist research related to the Buddhist philosophy of self-awareness. The results showed that the word self-awareness which appeared in the Sutta Pitaka and the Abhidhamma Pitaka was Paramattha-dhamma. Paramattha-dhamma consisted of Kaya, Citta, Cetasika, Rupa, and Nibbana. The value of self-awareness was a virtue, treating others with mercy, helping others to listen to good things, adjusting one's opinion to be clear, and finding peace of mind. The guideline for self-awareness in Theravada Buddhist Philosophy had two levels as follows. 1) The Guideline ona moral mundane level guided how to live a life to overcome evilness with goodness. In addition, acting morally in society. 2) The guideline in moral supermundane level for liberation.