In this essay, we discuss about history of Batinids through to the Seljuk state. This article was prepared for Seljuk History (HIST 209) lecture which given by Prof. Dr. Tufan Buzpınar at Istanbul Şehir University. This article also discusses how they became a regional power with Hasan Sabbâh of the Nazari which born from the Ismaili sect and the effect of this power on the Seljuks. The article describes that brief history of Batinids and their effects of Seljuks. Finally, Turkish sources have been translated into English. Please look at the references list to see the originals of the quotations.