The arrest took place at Javad Emam's home early Sunday morning, the reformist daily Shargh and the pro-regime news agency Fars reported.
On Sunday, it was also reported that three leading activists within the same movement have been arrested, a few weeks after the authorities cracked down on mass protests critical of the regime that broke out in the country. Tens of thousands of anti-regime demonstrators have reportedly been arrested in recent weeks.
The judiciary's Mizan news agency reported on Sunday that several arrests had been made, but without giving any names.
