A Frenchman tested positive for the new Covid-19 strain after recently traveling from London.
The case was found in the city of Tours and is believed to be the first in France.
In a statement, the French Health Ministry said the man in question arrived from London on December 19 and is currently in isolation.
It is believed to feel good, the ministry added.
It comes as the number of Covid-19 cases and deaths increased in the country, raising concerns that a new wave of the virus will affect the second-largest economy in the euro zone.
UK Health Secretary Matt Hancock recently said that an increase in coronavirus cases in the UK could have been linked to the new variant of the virus in the country.
Hancock said more than 1,000 cases of the new variant have been identified, mostly in south-east England.
In recent days, countries around the world have closed their borders to Great Britain and South Africa after the identification of cases of the new variant of the rapidly spreading coronavirus in those countries.
France recorded 20,262 new confirmed COVID-19 cases and 159 more related deaths in hospitals in the last 24 hours.
The number of confirmed COVID-19 cases in France now stands at 2,547,771, while its COVID-19 death toll stands at 62,427, the seventh highest in the world.