"Parvin Ardalan was sentenced to two to three years suspended jail," reformist newspaper Etemad said. "She was accused of illegal gathering … and defying the police in order to harm national security."
Ardalan, who won Sweden's Olof Palme Prize in 2007, faced the charges for a June 2006 demonstration at a Tehran main square demanding equal rights for women on divorce, inheritance and child custody.
The demonstration was broken up amid allegations of police brutality and 70 people were arrested.
In March, the 41-year-old activist was banned from leaving Iran for Stockholm to collect her award, won for her contribution to the women's rights movement.
Ardalan is one of the figureheads of the "One Million Signature" campaign that seeks to change Iran's laws that discriminate against women by collecting signatures online and in person.
The campaign, which is backed by Nobel peace prize winner Shirin Ebadi, was launched after the June 2006 demonstration.
Iran has exerted mounting pressure on women's rights advocates, and several have been arrested in recent months for calling for changes to Iranian laws or for taking part in public protests.
Four women's rights activists have been sentenced to suspended terms of flogging and jail for taking part in a March 2007 demonstration in front of a court where Ardalan and four fellow female activists were on trial.
