State Police are assisting Hallowell Police, and say the suspect robbed the Gardiner Savings Bank on Winthrop Street.
It happened around 9:30. The suspect is described as a white male, six feet tall, and heavy set. Police say he was wearing a black coat and a black hooded sweatshirt.
He allegedly handed a note to a teller, and did not show a weapon during the incident.
If you have any information call State Police at 1-800-452-4664.