According to officials, a 67-year-old man from the town was walking to work on Goodrich Street when he was followed by two men.
The victim said they asked him for money before attacking him and taking $4.
Moments later, the victim said released he had been stabbed.
A co-worker of the victim arrived shortly thereafter and transported him to the hospital.
The victim described the men as having dark black complexions and being in their 20s. They were wearing brown jackets and jeans.
Anyone with information is asked to contact Hamden police at 203-230-4000.