The robberies happened at the store at 1100 W. Girard Avenue in North Philadelphia.
The first robbery happened at 9:40 p.m. on Friday, August 10th while the second happened at 3:30 p.m. on Sunday, August 12th.
In both incidents, police say the man approached an employee demanding money from the cash register. Once he had the money, the man fled in an unknown direction.
The suspect is described as a black male, between 35 and 40 years old, bald with a goatee.
Anyone with information is asked to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through phillypolice.com.