Two masked men stole cash after forcing their way into the currency exchange at the Co-operative Travel in High Peak.
The robbery happened at about 1.20pm today (Friday, July 29) at the store in High Street West.
The offenders were wearing balaclavas and dark clothing, and ran into the store to demand cash.
It is thought they fled from the scene in a silver Mercedes Benz.
Detectives investigating the robbery want to hear from anyone who witnessed it or saw suspicious activity before it took place.
Did you see the car before or after, or do you know the people responsible for the offence?
Witnesses or anyone with information should call DS Ed Mellor on 101, quoting incident 342 of July 29th or call Crimestoppers on 0800 555 111.