This chapter shows that although the Epicureans claim that justice comes to be by agreements, they also argue for the existence of a robust virtue of justice. The first section of the chapter gives a general overview of the Epicurean theory of the virtues, while the second section examines in detail the passages in which Epicurean authors discuss the virtue of justice. The third and last section of the chapter turns to the precise relationship between contractual and aretaic justice on the Epicurean view. It argues that the former is a precondition for latter, as contractual justice specifies the content of aretaic justice and provides the developmental basis for aretaic justice to emerge.