Sanctions on Iran have brought the currency value crashing down to its lowest level against the dollar of all time, currency traders and monitors told AFP.
The rial traded between 39,000 and 40,000 to the dollar on Saturday, compared to 33,000 two weeks ago.
In January, it dropped to 37,000 per dollar amid rumors the head of the central bank could be fired.
Iran is facing a growing economic and social crisis brought on by Western sanctions, intended to target the banking and oil sectors.
The rial has been further hurt by stalled U.N. talks over its nuclear program and heightened political tensions, as well as what some analysts say is the mismanagement of the economy by the government.

Poverty has shot up in Iran, where a currency crisis brought on by Western sanctions is adding to people's woes.