In his long and articulated path, Evandro Agazzi has often faced issues and problems that are now counted in the discipline that we call bioethics. It is probably a kind of practical "landing" motivated, on the one hand, by his constant search for objective truth in philosophy of science, and, on the other, by his deep desire to contribute to the existential questions of our time. We find in Evandro Agazzi some elements that make his studies on the issues of bioethics solid and enriching: his profound knowledge of science, his strong attention to the ethical aspects of human life, his epistemological realism, his anthropological vision open to the complexity and the transcendence of the human person. Among his contributions we must mention his solid reflections on the concept of the human person. Some other issues, like the status of the human embryo and the moral reasoning in bioethics are also analyzed in this paper.