French Interior Minister Bernard Cazeneuve has been named as prime minister, replacing Manuel Valls, who resigned in order to make a bid for the presidency next year, the BBC reports.
Mr Valls presented his resignation to President Francois Hollande on Tuesday.
Mr Cazeneuve will be in charge of the Socialist government until June’s parliamentary elections.
He has played a key role in managing France’s security since the jihadist terror attacks in Paris last year.
Mr Valls will face other contenders in the Socialist primary next month.