Newly released surveillance video shows the suspect breaking the front window of Pac-A-Deli on Walnut Street in October.
Once inside he steals the entire cash register.
Investigators believe the same man is responsible for similar crimes this month, also caught on camera, at Palm Tree Gourmet and Gavin's Café.
Both restaurants are located on Pine Street.
The suspect is described as a black man, 40 years old with a beard.
He was wearing a light colored baseball cap, dark-colored (possibly blue) and white plaid construction style shirt with a light colored hood, blue jeans and tan boots.
Anyone with information is urged to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.