The question of the existence of the immortal soul extends from ancient times. Today many people believe in the immortality of the soul, which can be seen by how people are inclined towards a particular religion. Greater religions such as Christianity, Islam and Buddhism represent the view of the immortal soul. Science here is very clear on the issue of an immortal soul, it does not exist. On the other hand, philosophers like Plato and Descartes try to bring us closer to the question of the existence of the immortal soul with their arguments, and materialists mostly deny its existence. Christianity and Islam advocate the conditional justification of the immortality of the soul, that is, it is necessary to be rewarded or punished for the way of life we have led on earth. Therefore there is the immortality of the soul that will live after the death of the body either in heaven or in hell. Other faiths such as buddhism and hinduism advocate reincarnation, teachingabout reestablishing or continually restoringthe soul to the body after death. The soul is immortal and is returned to the new physical body after the death of the body. Karma will decide what future life they will be waiting for based on how they lived their previous life. Plato was one of the most important philosophers in defending the immortality of the soul. He offers us three proofs of immortality in his dialogue Phaedo: Cyclic evidence, an idyllic reminder of the evidence of immortality of the soul on the basis of ontological affinity. Some of the most significant arguments for the existence of the immortal soul were offered by Thomas Aquinas and R. Descartes. They consider the existence of the immortal soul and offer us arguments in support of this assertion. But not everyone is enthusiastic about the idea of the eternal soul. There are also those who criticize the existence of souls, such as D. Hume and T. Nagel. Each of them offers counter-arguments regarding the existence of the immortal soul and criticize Plato's idea of the eternal soul the most.