The tragedy happened on Saturday in the early afternoon in the neighborhood of the railway station of Vichy, in the Allier.
At around 13: 30, a two year old girl fell from the third floor of a building located at the corner of avenue de Lyon and the boulevard Gambetta.
The victim suffered a fall of a dozen metres.
Polytraumatisée, the girl has at first been taken to a hospital in Vichy.
It was then transported in critical condition by helicopter to the CHRU de Saint-Etienne.
An investigation was opened to know more about the circumstances of this accident.