The robbery happened at 3:48 p.m. on Friday, June 21st at the Bank of America at 3745 Aramingo Avenue.
Police say the suspect handed the teller a demand note.
Investigators only said his attempt at a robbery failed, and he then fled on foot in an unknown direction.
The suspect is described as a black male standing 5'10" tall with a medium build and a goatee. He was wearing a black hat with a large "B" insignia on the front and a black t-shirt.
Anyone with information is asked to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or go to PhillyPolice.com.