Hundreds of people marched from Herald Square to Union Square Thursday in what they called a “show of unity” for the labor movement.

The AFL-CIO formed the March “for everyone who is frustrated and worried about the growing disparity in this country,” organizers said.

They were reportedly joined by Occupy Wall Street activists.

Earlier in the day, several protesters calling for more funding to fight AIDS were arrested after forming a human chain near City Hall.

The protesters were part of a larger group of about 100 people who marched from Zuccotti Park to City Hall.

About half a dozen of them were arrested after chaining themselves together and lying flat on the pavement.

Police pushed them to the side of the road so that blocked traffic could pass through.

Protesters want Mayor Bloomberg and members of Congress to institute taxes on Wall Street trade to pay for AIDS treatment.