President François Hollande said he had approved a broad plan against the deadly virus including 200 beds in Guinea, some of which would be reserved for health workers caring for the sick.
The cash should be available within 10 or so days and should cover French costs in the fight against Ebola in the region for "two to three months to come," according to France's Ebola coordinator, Jean-Francois Delfraissy.
France also pledged to set up two training centres for health workers, one in France, one in Guinea.
In addition, French biotechnology companies will set up rapid diagnostic tests in Guinea.
Ebola has killed nearly 5,000 people in the outbreak that has centred on west Africa.
There have been many false alarms in France but, aside from a nurse repatriated from west Africa, there has been no case on French soil.