Demonstrators staged “die-ins” at three Manhattan transit hubs Monday night to protest the Eric Garner case.

The group of around 40 people chanted “Black lives matter” and “No justice, no peace” before lying on the floor of the main concourse of Grand Central Terminal at around 7 p.m.

After several hours, they marched to the Port Authority Bus Terminal before heading to Penn Station.

The MTA said in January it would no longer allow the “die-ins” after protesters tussled with cops and prevented commuters from getting to their trains.

But the order has not been enforced in earnest, and protests have continued on an almost weekly basis.

The MTA said cops are allowed to use their discretion before busting up protests, and aren’t required to end them if demonstrators aren’t blocking travelers.

Several protesters were arrested around the city last year after a Staten Island grand jury declined to indict the officer they believe to be responsible for Garner’s death by chokehold last summer.