Abstract: One of the new art forms that followed independently is "conceptual art". Since, photography is always considered as a document and approaches to reality, it is considered as a main component in different new art forms specifically in conceptual art. As photography plays an essential role in the first artworks of conceptual art called "one and three chairs" by Joseph Kossuth, it made me to address this question: "to what extend photography can play an essential role in conceptual artworks?" It was not very late after rise of conceptual art that Iran was in line with these new developments. Therefore, it is tried to study the role of photography in conceptual art through investigating Iranian artist’s art works. Here, it is tried to review two main exhibitions of conceptual artworks held in contemporary art museum of Tehran during 2001-2002 as well as field study approaches about artworks in other galleries, to achieve the said goal. The present study attempts to define conceptual art beside a quick review of the first photos that apparently effected formation of conceptual art in Iranian artist’s artworks.