Speaking after his first bilateral meeting with Irish Taoiseach Leo Varadkar, he stressed the importance of the border issues in Brexit negotiations.
He also offered his support “along with the rest of the European Union” to Ireland.
Mr Macron said it is “essential” for Ireland that the Good Friday Agreement is “totally” preserved after Brexit.
And made clear that Ireland is “at the heart” of Brexit discussions
The 39-year-old added that France and Ireland have the same aims for the European Union which would be discussed on Friday morning; a financial union, political reforms, immigration and defence.
The French president reiterated that he was looking forward to working closely with Mr Varadkar in the future, as France will be the closest member state nation to Ireland once the UK leaves the bloc in March 2019.
They will be in close cooperation as negotiations move from Phase 1 to Phase 2.
The Taoiseach said that he recognised the “deep” ties between the two nations and he looked forward to working together in the future “as partners”.
Adding: “We celebrate the Europe we built together.”
The two leaders held their first formal meeting at the Elysée Palace. T
he two men also discussed the idea of the Celtic Interconnector, a proposed €1 billion sub-sea power cable between Brittany and Ireland that could compensate for any potential loss of energy supplies from the UK post-Brexit.
Earlier this month, Varadkar had said Ireland wanted Britain to commit to a fallback option that would avoid a customs border returning to the island of Ireland, should its plan of keeping the closest possible ties with the EU fall through.