Background: The science of ethics is one of the most complete basic sciences that human beings urgently need, because the subject of knowledge of ethics is the human soul and its inner construction. The moral thinking of the thinkers of the Frankfurt School, as one of the ideas of the twentieth century, is based on the ethics of virtue; because the moral act is known as the act which is the result of the virtues and the true nature of the actor of the act. In this research, the researcher intends to study the concept of ethics and strategies to achieve it in the minds of Frankfurt school thinkers by using descriptive-analytical method and documentary study.
Conclusion: The findings show that the thinkers of this school consider morality to mean freedom, and in their view, a man adorned with moral ornaments is a human being who is a slave to internal or external powers, such as the expectations of others, industrial machines, lust, power, There should be no status, technology, etc., and each of the thinkers defines the way of realizing morality in a specific tool. Adorno sees human morality in beauty and art. Marcuse seeks the realization of morality through the rational reconstruction of society. Eric Fromm believes in the formulation of moral principles by oneself, and Habermas sees dialogue as the path to freedom and morality.