Around 3,000 people have marched near the home of Brazil's Interim President Michel Temer.
The demonstrations in Sao Paolo was organized by several groups calling for a halt to austerity plans, which protesters say will eat away at social programs that millions of Brazilians rely on.
Temer has pledged a series of business-friendly reforms to pull Brazil out of its worst recession in decades. He was handed the reins of Latin America's largest economy after the Senate suspended leftist President Dilma Rousseff.