The French labour ministry said on Thursday that the number of registered job seekers without any employment activity rose 0.6% in August, after a 0.1% decline in July.
The total number of partial or fully unemployed was 3.57 million people.
The total number of the long-term unemployed increased by 0.8% to 2.4 million people in August.
The unemployment in France remains at high levels since French President Francois Hollande took office in 2012. The French government is struggling to bring down unemployment.