Purpose: this article proposes an identification of the nature of legal bioethics as a new field of knowledge in the context of international discussion and analysis of the relationship between law and bioethics. In the 21st century, law and bioethics are undergoing a transformation based on the advances of science and technology, and their mutual regulatory influence is expanding. The origins of legal and ethical regulators of human vital interests and needs in the context of their reproduction and satisfaction of biological interests have long-standing relationships that, in the modern context of the use of scientific and technological advances, are acquiring new forms and dynamics. Methods: dialectics, legal hermeneutics, comparative analysis, systems analysis, synergetic. Results: the increasing juridification and medicalization of bioethical principles in the 21st century is contributing to the emergence of a new field of converged knowledge – legal bioethics, which possesses the following qualities: an integrated field of knowledge that provides the normative-legal and normative-ethical contours of the emerging constitution of life; a new metadiscipline necessary for the training of specialists in biolaw, bioethics, and biomedicine; A cross-sectoral legal entity with domestic, supranational (including interregional), and international regulatory levels. Discussion: legal bioethics should be developed as an independent legal, ethical-normative, and medical-legal discipline, integrating legal, philosophical, medical, and social approaches.