The staff and patrons of a Fitzroy supermarket have miraculously escaped injury after a car ploughed through the store’s front window.

Patrons of Piedimonte's Supermarket in Best Street, Fitzroy were left stunned on Monday morning when the small hatchback crashed through the shop's front window about 11.30am.

A Metropolitan Fire Brigade spokesman said approximately 20 people were inside the supermarket when the car, driven by an elderly woman, suddenly drove into the store.

It is believed the woman mistakenly accelerated after colliding with another vehicle.