Abstract
Philosophy of psychiatry is a philosophical discipline focused on fundamental theoretical and conceptual issues in contemporary psychiatry. One of such issues is the so-called demarcation problem, which can be understood as the question about the difference between mental illness and psychological functioning which is normal, or healthy. After a brief account of the standard criteria for such differentiation the dominant naturalistic understanding of psychiatry as well as the notion of mental illness proper to the latter are subjected to scrutiny. Then, in turn, critical currents are investigated with their concept of psychiatry as a discipline of humanistic and normative character. Some of these currents, such as the antipsychiatry of Szasz, are of historical importance today. Still, however, many threads are discussed, especially in the context of the notion of mental disorder developed by the American Psychiatric Association. One may expect that such discussions will be fruitfully carried on, especially in those cases when particular disorders are philosophically investigated.