The appointment is crucial for Mr Macron, who needs to do well in next month's parliamentary elections to push through his planned economic reforms.
Later he will travel to Germany to meet Chancellor Angela Merkel.
The 39-year-old former investment banker and economy minister was inaugurated yesterday in a ceremony at the Élysée Palace.
He promised to convince people that "the power of France is not declining - that we are on the brink of a great renaissance".