The Subway restaurant at 4435 Centennial Boulevard in the Springs was robbed just before 7 p.m. Monday.
Police say a man walked in and threatened the employee with a knife.
The robber demanded cash and then left the store in an unknown direction. No one was injured during the robbery.
Police sat the suspect is described as a Hispanic Male, 20's in age, 5'10", skinny build, wearing a green sweater, black pants and black aviator type sunglasses.
If you have any information about this robbery, please call Crime Stoppers at 634-STOP.