Avaz Heidarpour, who sits on the Iranian parliament's national security committee, said experts have reverse-engineered the RQ-170 Sentinel craft, and added Iran is now capable of launching a production line for the unmanned aircraft.
His remarks were posted on the parliament's website, www.icana.ir/en on Wednesday.
Iranian officials frequently announce technological and military breakthroughs, most of which are impossible to confirm independently.
Mr Heidarpour's comment comes two days after Iran's Revolutionary Guard said it had decoded all data from the drone that went down in December 2011 near Iran's eastern border with Afghanistan.
Last week, the Guard claimed it had captured another US drone after it entered Iranian airspace over the Persian Gulf.