The demonstration, in the huge Cite Soleil shantytown, one of the most dangerous districts of the capital, was peaceful. The UN has a base there but does not control the neighbourhood, which is run by armed gangs.
The protest follows a violent student demonstration on Tuesday against the UN forces.
Dozens of demonstrators, some shouting "Down with the UN," threw stones, broke UN vehicles' windshields, and burned a US flag near Haiti's presidential palace.
Since mid-2004 the UN has maintained more than 7,000 troops and 1,200 police in Haiti to help stabilise the poorest country in the Americas.

Copyright AFP (Agence France-Presse), 2006