Speaking three days after Paris was hit by devastating jihadist attacks, Manuel Valls said the city would be the "capital of the world" when the crunch climate talks kick off on November 30.
"No head of state, of government -- on the contrary -- has asked us to postpone this meeting. All want to be there," Valls said on RTL radio.
"To do otherwise would, I believe, be to yield to terrorism."
"France will be the capital of the world," he said, adding the conference would "probably" be reduced to the negotiation.
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Islamic State jihadists have claimed a series of coordinated attacks late Friday by gunmen and suicide bombers who killed at least 129 people in scenes of carnage at a concert hall, restaurants and the national stadium.
US President Barack Obama still intends to attend the climate talks, known by the UN acronym as COP21, a US official said Saturday.
Obama will be one of more than 115 heads of state and government expected at the conference, taking place at Le Bourget outside Paris from November 30 to December 11.