He was convicted of contesting crimes against humanity.
The former Front National chief was convicted of the same charge in 2012 after saying France's Nazi occupation had been "not particularly inhumane".
France has strict laws against Holocaust denial.
France: Le Pen fined over Holocaust remarks
Former French far-right leader Jean-Marie Le Pen has been fined 30,000 euros (£24,000; $34,000) for calling the Nazi gas chambers a "detail" of World War Two.
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