It has taken its hardest line yet with Niger, saying it had to show that it "cannot only bark but can bite".
One of the demonstrators in Niamey held a placard that said: "Long live Niger, Russia, Mali and Burkina.
France has between 1,000 and 1,500 troops in Niger, helping to fight an Islamist insurgency that has spread across the region.
INTERVENTION PLANWest African defence chiefs meeting in Nigeria were due to conclude their discussions about possible intervention in Niger, although they have said this would be a last resort.
The goal of the two-day meeting was to draw up a plan for an eventual military intervention to restore constitutional order, according to a statement from Ivory Coast's National Security Council.
Persons:
General Abdourahamane Tiani, Mohamed Bazoum, Tiani, Ivory, Salifou Mody, Joe Biden, Nigeriens, Camillus Eboh, Thiam Ndiaga, Tiemoko Diallo, Ange Aboa, Alessandra Prentice, Nellie Peyton, Alexander Winning, Emelia, Nick Macfie, Giles Elgood
Organizations:
REUTERS, West, Economic, West African States, EU, Reuters, Ivory Coast's National Security Council, ECOWAS, juntas, Nigerien, Islamic, Thomson
Locations:
Niamey, Niger, Mali, Burkina Faso, NIAMEY, ABUJA, West, Central Africa, Russia, Burkina, Down, France, Nigeria, Nigerian, West Africa, Guinea, Bissau, al Qaeda, Islamic State, Paris