The announcement comes after a series of hostile statements and protests against France after the junta ousted pro-Western President Mohamed Bazoum in late July.
The military junta accuses France of planning a military intervention to reinstate Bazoum, something France has denied.
“The coup plotters in Niger do not have the authority” to expel the ambassador, reads the response from France. “We continuously evaluate and monitor security and operations at the embassy,” the French foreign ministry added.
France has around 1,500 soldiers in the country who assisted Bazoum in the fight against jihadists.