It happened on October 28 at the Dream Boutique Adult Store located on the 6000 block of Passyunk Avenue.
The suspect was caught on surveillance walking into the store shortly after 9 p.m.
After browsing around for 5 minutes, he approached the counter and pulled a handgun from his sweatshirt pocket.
He pointed it at the clerk and demanded money.
The robber got away with close to $200 from the register before fleeing the store.
He ran across the parking lot and drove off in a dark colored sedan heading north on 61st Street.
Police describe the suspect as a white male, 25-30 years old, 5'11", 165lbs. with short, light colored hair. He was wearing an oversized black hooded sweatshirt, dark colored jeans and armed with a handgun.
Anyone with information is asked to contact Philadelphia Police at 215.686.TIPS (8477) or text a tip to PPD TIP (773847).
VIDEO: Click here to watch the surveillance video