Appearance of nationalism in each country is influenced by some social , religious and political factors throughout the history of that country In Iranian contemporary history, this process has also been dependent upon opinions and thoughts of some of the nationalist intellectuals and modernists their intellectual products played an important role in various social , intellectual and even artistic areas of the country .thus this paper firstly seeks to introduce nationalistic social trends in Iran and classify nationalist architectural tendencies in flounced by nationalist social trends besides explication of nationalist principles of each tendency and in the following , along with explanation of nationalist tendencies in architecture , some architectural works are introduced as examples.