It happened around 4 p.m. at the SunTrust branch in the 7300 block of Creedmoor Road near Howard Road.
The suspect was described as a slender white male in his 50s to 60s who stood about 5 foot 8 inches tall.
He was wearing a hooded sweatshirt and cap.
No one was injured in the robbery. The suspect never showed a weapon.
Anyone who might recognize the suspect or who remembers seeing him is asked to call Raleigh CrimeStoppers at (919) 834-HELP.