"I tested positive for COVID-19 this evening," Le Maire said in a statement on Twitter, adding that he would remain at home for seven days.
"I immediately followed the health measures brought in by the government by self-isolating at home."
He gave no further details.
French Prime Minister Jean Castex last week tested negative for COVID-19 after he came into contact with someone who tested positive at the Tour de France cycle race.
France has been grappling with a surge in new confirmed coronavirus cases and earlier on Friday reported a record number of 13,215 for any 24 hour period since the start of the pandemic. The daily death toll jumped to a four-month high.
Epidemiologists blame the increase on a combination of faster circulation of the virus and a six-fold increase in testing since the government made it free.
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