The aim of the present study is to compare and critique the moral principles of Albert Ellis's theory (REBT) in the light of Islamic ethics. The method of the present study is analytical-descriptive and the sampling Method in this study is goal-oriented. Necessary information was collected in a library manner by studying sources and books. The method of analysis has been content analysis. The results showed that Ellis's ethical principles are: ethical non-realism, pleasure-seeking, individualism, sensuality and no standard for good and bad behavior. However, all these are not acceptable from the point of view of Islam, as Islam believes the standard for the right and wrong is clear and distinct; pleasure is not the only standard of right and wrong behavior, pleasures are not merely worldly, and the ultimate goal of life and creation is to reach the nearness of God. All human behaviors are ethical if done with the intention and purpose of the nearness of God.
