Nishaboor discursive space analysis and scrutinizing main of Fadl ibn Shazan focusing on theological and juridical disputes during first half of the third century (9th century) necessitates to comprehend Nishaboor political environment and scholars’ intentions. Regarding differences and contradictions of scholar’s idea in this issue, it is necessary to expound the roots of this diversity and inconsistency which resulted various judgments and evolutions. This Research using Laclau and Mouffe's discourse analysis concluded that the Nishaboor relatively intellectual open space which dominated over religious thought and controversies provided competent and compatible situation for Fadl ibn Shazan to explain his shi’te views and spread them in this city, initiating was flowered by this discursive space.