According to reports in the French press, the unnamed person was attacked by a shark while trying to fish underwater 500 meters off the island of Poum in the region.
Despite the efforts of a member of his family to help, the man who could not escape the attack of the shark lost his life.
The incident in question was the second fatal shark attack in New Caledonia this year.
A 59-year-old Australian tourist was killed in a shark attack while swimming at Chateau-Royal Beach in the Noumea region in February.
Authorities had banned some beaches in the region against shark attacks.