Seljuks (1038-1157), who constituting one of the important era of Turkish history, since they had appeared in history in the middle of 11th Century, combined almost all of the Muslim territory under their administration and provided that era as the "Turkish Century" in nearly a hundred years. There is not enough information about early period of Seljuk Dynasty, who was a member of Oghuz-Turkmen institutional construction and agreed by all of the historical sources that they had originated from a Qinik tribe. For this reason, situation of them in an Oghuz-Turkman traditions and which they depend of their power were discussed by some historians. Even though, origin of Seljuks is indicated about Oghuz tribes by historical documents about their early period, they are indicated about Afrasiab dynasty by some of the late period sources. This situation leads to confusion.