It happened on November 17th at 11:30 p.m. at the Dunkin Donuts shop at 5001 Rising Sun Avenue.
Police say the suspect walked up to the counter and demanded money from the register.
Surveillance video shows him walking behind the counter to demand more money, then forcing store employees into a back room.
The man fled with an undetermined amount of cash.
Police have released the following description of the suspect:
Black male, 25-35 years-of-age, 6'3", thin build, beard, black hooded jacket with stripes on the sleeves, white shirt and dark colored jeans.
Anyone with information about the crime or the suspect is asked to contact Detective Aitken at Philadelphia Police East Detectives Division, 215-686-3243/3244.
To submit a tip via telephone, dial 215.686.TIPS (8477) or text a tip to PPD TIP or 773847.