Witnesses say the man forced his way behind the counter and demanded money.
He reportedly emptied two registers and fled the scene in a beige/tan colored Nissan Maxima with an unknown PA tag driven by a second male.
The suspect who entered the KFC is described as a black male, 30-35 years old, 6'1" tall about 175 pounds, wearing a fatigue style hat, blue jeans, black work shirt, glasses and armed with a black handgun.
There is no description for the driver of the vehicle.
Anyone with information is asked to contact Southwest Detective Division at 215-686-3183 / 3184.
You can get the latest crime statistics from the Philadelphia Police by CLICKING HERE for the force's crime data mapping site.