It happened at Sardi's Chicken on 50 North McCain Drive around 12:29 this afternoon.
According to Frederick Police Maria Flores-Garcia had driven a large SUV into the restaurant where several patrons inside were injured.
Officials say Flores-Garcia was arrested for driving without a license and negligent driving.
The two patrons injured suffered non-life threatening injuries.
One of the patrons was taken to the Meritus Medical Center in Hagerstown.
Police are still investigating.