This paper focuses on Pavel Smerdyakov's personality in Dostoevsky's last novel The Brothers Karamazov. At first, we analyze his characteristic peculiarities(mysophobia, 'contemplation' etc.) and ideology expressed in his behaviour and conversations with the others. And then we examine the secret relationship of Ivan and Smerdyakov from latter's point of view. Through detailed analysis it turns out that the initiative is taken not by Ivan but by Smerdyakov. Particularly, it's quite interesting that after a catastrophe the real murderer with a kind of pride gradually begins to despise his 'young master'. Nevertheless, he finishes his life, committing a suicide. We try to find the key to such a riddle, reading his meeting ('confession de foi') with his potential lover(Marya Kondratievna) closely, and the argument of a prosecutor and a lawyer. In conclusion, we discuss the meaning of his 'aesthetic death' in the whole structure of the novel.