The tragedy happened Thursday, the holiday centre of the Porteau located in Talmont-Saint-Hilaire, in the Vendée.
A girl, aged 11 years, amused himself to climb a tree when it was hung up accidentally because his hood was clinging to a branch.
Then she began to strangle, the coaches have reached the issue and began to provide him with the gestures of the first aid.
The fire brigade then arrived and took charge of the child who was cyanotic, and his skin had begun to turn blue.
Before it is transported to the hospital, the girl has started to breathe.
It is not known the state of his health this Friday morning.