France first launched studies into replacing the Charles de Gaulle in 2018, with preliminary work beginning two years later.
The announcement of the official start of construction comes despite a budgetary deadlock gripping the European Union’s second-largest economy.
Criticism in France, including from military chief General Fabien Mandon, had focused on whether other more pressing areas should be prioritised amid fears of a European war with Russia.
This official launch will make it possible to sign all of the contracts necessary for the project, Macron’s office said.
Also nuclear-powered, the new carrier will be far larger than the current flagship.
It will displace nearly 80,000 tonnes and be around 310m long, compared with 42,000 tonnes and 261m for the Charles de Gaulle.
With a crew of 2000, it will be able to hold 30 fighter jets.
While the future ship will still be dwarfed by the 11 vast supercarriers of the US Navy, which each displace more than 100,000 tonnes, only China and Britain’s Royal Navy operate similarly sized carriers, all of which are conventionally powered.
Focus on drug trafficking
Macron was speaking during a visit to the UAE to celebrate Christmas with French troops and to discuss bilateral ties with the Gulf state, with Paris hoping for more co-operation in its fight against drug trafficking.
Macron met Emirati President Mohamed bin Zayed Al Nahyan today, with the French leader posting on X that they had discussed how to strengthen their strategic partnership, particularly for “stability in the Middle East”.
The UAE is a major buyer of French military hardware and Paris is reportedly considering turning to Abu Dhabi to rescue its troubled future fighter jet programme with Germany on the brink of pulling out.
The French President traditionally celebrates the end-of-year holidays with troops deployed abroad, of whom there are more than 900 in the UAE.
Some of their work focuses on the war against drug-trafficking, with France hoping for more Emirati co-operation.
Major traffickers are believed to have found refuge in the UAE, in Dubai in particular, and some are thought to have built up substantial real estate portfolios there.
The French delegation includes Justice Minister Gerald Darmanin, who last month called on the UAE to extradite some 15 suspected drug traffickers wanted by France.
-Agence France-Presse