Although the Health Law of Mongolia and other legal acts do not prohibit euthanasia and patient hasa rightto refuse treatment. But on the opposite side the criminal law prohibition is still valid by the explanation of Supreme court of Mongolia. If doctors do euthanasia with patients or their loved ones, then doctors have a risk to suits with the sanction of imprisonment for 10-15 years, according to the 2002 Mongolian criminal law’s code 91.1 and it is considered as crime. The Supreme Court interpretation states that doctor must be judged by 91.1 if he/she does euthanasia with the permission of the victim. Legal practitioners of environmental health officers and the lack of action identified for families and patients of consumer awareness, attitude is the basis of our research. The aim of the study is to determine legal knowledge and the attitude of the medical staffs, caregivers of medical clients and palliative patient. This is because in order to achieve integrated understanding of medical and law sciences issues is required in this area of specific research.