The article is a critical commentary on Peter Singer’s thesis that the brain death definition should be replaced by a rule outlining the conditions permitting organ harvesting from patients who are biologically alive but are no longer persons. Largely agreeing with the position, I believe it can be justified not only on the basis of utilitarian arguments, but also those based on Kantian ethics and Christianity. However, due to the lack of reliable methods diagnosing complete and irreversible loss of consciousness, we should refrain from implementing upper brain death into medical practice. Organs also should not be harvested from people in a persistent vegetative state or from anencephalic children, for similar reasons. At the same time, patients who suffered from whole-brain death should not be artificially sustained; in light of current knowledge they can be declared dead and become organ donors.