It happened two weeks ago, on October 16th.
Surveillance video shows the man walking into the Little Caesars Pizza in the 5200 block of Walnut Street at 9:49 p.m.
He pulls out a handgun, points it at a worker and demands money.
He then drags the man to the safe, forces him to open it and flees with an undetermined amount of cash.
Police are looking for a black male, 25-30 years old, 5'8"-6'0" tall with a brown complexion, seen wearing a gray hooded jacket and blue jeans.
Anyone with information is urged to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.