Police said the incident took place around 8pm when the armed and masked man got into the shop and threatened the shopkeeper.
He took the shopkeeper to the cashbox and left the scene after taking the money.
Referring to witnesses, Police said the miscreant was wearing a greenish scarf, dark trousers and a brown jumper. He was about 180 centimetres to 185 centimetres tall.
Kanta-Häme police are conducting extensive drives to nab the criminal and requested people to provide them with available information about him.
