摘要:This paper deals with the ethics in the epistemology of Karl Popper from his conception and understanding of the limitations of human knowledge, the importance of a demarcation criterion of scientific statements through the falsification of theories and the defence of critical rationalism as a stimulus to criticism, self-criticism, daring and creativity in scientific activities. Ethics in Popperian epistemology manifests itself in the commitment of science to the construction of a just society and the exercise of responsible citizenship, which constituted an original and innovative contribution for a time when dogmatism prevailed in scientific presuppositions. In addition, we highlight the central role of critical rationalism as an ethical matrix in Popperian epistemology that includes important references to pragmatic, ethical and social values as an effort to reduce violence, crime and cruelty.