Sahifat al-Sajjadiyya is one of the most deliberate and beautiful collections of prayers. At the same time it consists of many issues concerning political, social, moral, psychological, philosophical, scientific and economic fields. This article by analyzing some of these prayers, discusses a kind of Anthropology from the viewpoint of the Imam Sajjad. At first, it has a general glance on the subject. Then it discusses subject such as: positive and negative attributes of human being, his strong and short come aspects, and the factors that causes him to fall down from his statue. At last, "perfect or ideal man" is described which the aim of all the Prophets an Imams had been to define and to train a human as such.