It happened just after 1 p.m. at Popeye's Chicken located on the 4200 block of North Broad Street
Police say a 30 year-old female employee was behind the counter when the suspect approached.
He has his hand in his pocket to simulate a gun and demanded money.
The clerk refused his demands and the robber fled the restaurant empty handed.
Police describe the suspect as a black male, 30-50 years-old, 5'7" tall with a thin build and salt and pepper hair. He was wearing a black jacket, light gray hooded sweatshirt, blue jeans, tan boots.
Anyone with information is asked to contact police at 215.686.TIPS (8477) or text a tip to PPD TIP (773847).