The Iranian officials are to take part in the first round of talks to be held after extension of negotiation deadline between Iran and Group5+1 (the US, Britain, France, Russia and China plus Germany) for another seven months.
The Iranian delegation is headed by two deputies of foreign minister Seyed Abbas Araqchi and Majid Takht Ravanchi.
During the talks, the Iranian negotiators will hold bilateral talks with members of delegations from US and other participating countries in the talks.
The European Union confirmed on Saturday that the representatives of Iran and the Group 5+1 will convene again in Geneva on December 17 for a fresh round of nuclear talks.
"The political directors (of the world powers) and Iran will meet again on 17 December 2014 in Geneva for a one-day meeting to continue diplomatic efforts towards reaching a long-term, comprehensive solution," an EU statement said.
Araqchi had announced earlier that the next round of the nuclear talks between Tehran and the G5+1 will be held at the level of deputy foreign ministers in Geneva, Switzerland.
"The next round of talks between Iran and the G5+1 will be held in the Swiss city of Geneva on December 17," Araqchi said on Thursday.
The 10th and last round of negotiations between Iran and the six world powers was held in Vienna from November 18 to 24.
In July, Tehran and the six countries agreed to extend negotiations until November 24 after they failed to reach an agreement on a number of key issues.