A robber bound a West Village restaurant employee with duct tape, then took off with $8,000 cash on Friday, cops said Saturday.

The thief barged into the basement office of the Knickerbocker Grill on University Place around 1 a.m. Friday.

Once inside, he walked up to the 62-year-old manager — who had been counting money — and simulated a firearm.

Then he wrapped the tape around the manager’s ankles and wrists and also placed a plastic bag over the victim’s head, according to law enforcement sources.

He grabbed the wad of cash before bolting from the eatery.

He was last seen wearing a black jacket, a gray hooded sweatshirt, black pants, gray sneakers and a black backpack.