IAEA representative Reza Najafi represented the Islamic Republic and IAEA's Deputy Director General for Safegurds Tero Varjoranta represented the agency.
The talks were held in the presence of representatives from Iran's Ministry of Foreign Affairs and the Atomic Energy Organization of Iran (AEOI).
The visit follows a few days after Iran’s envoy to the IAEA Reza Najafi said Iran was ready to allow IAEA inspectors visit a site in Marivan, Kurdistan Province in western Iran.
A IAEA report in 2011 claimed to have information indicating large-scale high-explosive experiments at the site.
Najafi said November 20, 2014 Iran would give the Vienna-based IAEA access to the Marivan site on a "voluntary basis”.
Tehran’s cooperation with IAEA is intended to provide optimum transparency on its nuclear activities in order to help solve disputes with Western powers.
"The recent report issued by IAEA was vague and did not meet Iran's interests as we have provided clear explanations which had not been reflected in the recent report,” Spokesman for the Atomic Energy Organization of Iran (AEOI) Behrouz Kamalvandi said last week.
Iran and the group 5+1 are trying to hammer out a comprehensive nuclear deal by July 1.
Iran says that the revocation of all sanctions is needed before it could strike the deal.