Rafsanjani made the comment in Damascus Wednesday at the start of a five-day official visit to Syria, a day after Iran announced that it has succeeded to enrich uranium needed to build nuclear weapons.
"We will not threaten anyone or harass anybody in any part of the world and our capacities will be placed at the service of peace and used in cooperation with others," he said, without identifying the parties with whom Iran will cooperate.
Rafsanjani, also head of Iran's powerful Expediency Council, described his country's success in possessing nuclear technology as "a great achievement" hoping the program will continue till the end.
"The Islamic Republic of Iran will not surrender to pressures and the concern voiced by certain countries over Iran's nuclear success is nothing but a pretext to prevent us from acquiring nuclear technology and keep us under the mercy of Western powers," Rafsanhani said.
He stressed that Iran and Syria are in the same trench and that Iran "considers that the Syrians are in a state of resistance and that Syria's enemies are trying to increase pressure to quench the resistance of the Syrian people."
The Syrian News Agency, SANA, said Rafsanjani was officially welcomed at Damascus airport by Deputy President for Political Affairs Farouk Sharaa.