The purpose of this paper is to examine the catholic perspectives on euthanasia. Their bioethical perspectives on euthanasia are chiefly a theological one. A distinctive approach within the catholic is natural law approach. The claim of natural law is that there are objective moral truths that can be known by all human beings. A second distinctive approach of catholic bioethics is the authoritative church teaching. The catholic church recognizes a special god-given hierarchical teaching function belonging to the pope and the bishops as well as to councils of the church, called the magisterium, charged with teaching the faithful in matters of faith and morals. The most important magisterial document relevant to the bioethics to be considered in this paper is “Declaration on Euthanasia”. The Catholic bioethics developed a number of important principles: common good, human dignity, option for the poors, stewardship. subsidiarity, and totality. The Declaration defines euthanasia as an action of an omission which of itself of by intention causes death, in order that all suffering may in this way be eliminated. Euthanasia is a grave violation of the law of God, since it is the deliberate and morally unacceptable killing of human person. The Declaration distinguish between ordinary or proportionate treatments and extraordinary or disproportionate treatments. Extraordinary treatments is that a means is extraordinary if it imposes a grave burden on a person and prevents him of her from striving for the spiritual purpose of life. I think that extraordinary treatments is passive euthanasia. Therefore we could get the way to solve the problem of euthanasia in this interpretation about extraordinary treatments.