Police have released a CCTV image (pictured) of a hooded man they would like to speak to in connection with the incident, which took place between 6.25am and 6.35am.
The man entered the Holybourne shop and post office on London Road and threatened a member of staff to open the tills. He then stole cash before leaving the shop and riding off on a pedal cycle towards Alton.
He is described as being around 6ft tall and of skinny build. He was wearing a full facial covering, a maroon coloured hooded sweatshirt with the hood up, light trousers and light trainers.