The incident happened at a Flushing Savings Bank on Hollis Court Boulevard in Auburndale on October 25.
Authorities say the suspect passed a demand note to the teller and fled with an undetermined amount of money.
The suspect is described as white male wearing a white hat, gray sweatshirt and black backpack.
Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 800-577-TIPS.