It happened Tuesday evening at the West Suburban Bank branch on West Street just as the bank was about to close.
Surveillance cameras captured images of the suspects who had their faces covered. One man was armed with a gun.
The suspects jumped over the teller's counter and employees' desk and grabbed money before running out.
No one was hurt.
According to the FBI, the holdup was the 203rd bank robbery this year --nearly double the number of robberies last year.