Euthanasia is a very controversial topic, because it is a way of painlessly killing a patient who has a debilitating disease that cannot be cured, or the patient is in a coma and he has no way of getting out of it. In this case some societies consider it a good way to die, since it is done to relieve pain and suffering. Some, especially most religious individuals, consider this a form of murder, which raises a question of morality. In this article, the author discusses the moral issues and opinions on this topic in different societies.Keywords: euthanasia, painless killing, society, religions, moralityINTRODUCTIONEuthanasia, also known as mercy killing, is a way of putting an end to their lives painlessly and with a reason to end their suffering. It is also known as assisted suicide. Different societies have different opinions on this topic, and that is why it is necessary to look at the topics to understand the reasoning from different perspectives. It can be said that there are three types of euthanasia; voluntary, involuntary and non-voluntary. Euthanasia is considered voluntary when practiced with the express choice of the person to die, while practiced against their will it is considered involuntary. Involuntary assisted suicide is practiced when the person being put to death is unable to think and make his or her own choice due to being in a coma or having a seriously ill child. Each of these 3 types can be divided into 2 subtypes; active and passive. Active euthanasia occurs when the patient is killed, for example by lethal injection. Passive euthanasia occurs when the patient is allowed to die by disconnecting them from medical life support to let the disease kill them. Methodist, Presbyterian and Quaker, which allow the individual to make a decision in the case of active euthanasia. (http://www.bbc.co.uk/ethics/eutanasia/religion/religion.shtml)CONCLUSIONEuthanasia is a controversial topic around the world which always evokes strong positive and negative opinions on whether it is moral or immoral to help to end someone's life, either during their severe suffering due to an incurable disease, or due to a state of terminal unconsciousness during a coma. In my opinion, people who suffer without the possibility of improvement or recovery should have the right to decide about their own lives, as should family members of those who are permanently in a persistent vegetative state without any possibility of regaining consciousness. No person should ever be forced to suffer against their will.