About 50 protesters, including some from Sinn Fein, forced their way through the main gates of Government Buildings and scuffled with gardai in the wake of political turmoil over the EU bailout.
Among the demonstrators was one of the party's TDs, Aengus O Snodaigh, who said they were demanding the IMF leave the country and that a general election be called immediately.
Mr O Snodaigh said: "We're putting across the message that there is a huge level of anger out there amongst the normal punter, and that they're demanding that the Government goes, so we got that message across, hopefully, today."
The groups marched from the gates of Leinster House, the seat of parliament, to Government Buildings which houses the Taoiseach's office.
A number tried to hold a sit-down protest after being escorted out of the grounds.