While Macron gained 0.5 point Le Pen is down 1 point in one week, the poll showed.
With four days until Sunday's first round of the presidential election, candidates blanketed the country ahead of the nail-biting election. Marine Le Pen could come top or come fourth and crash out - right now it's a battle to survive for the far-right candidate.
Mr Melenchon and the 10 other presidential candidates appeared on a television programme on Thursday night where they are scheduled to speak one after another.
For Andre Boyer (75), it was immigration above all else that secured his vote for Ms Le Pen.
Socialist candidate Benoit Hamon promised that if he won France's presidency he would give asylum to Edward Snowden, the former U.S. National Security Agency contractor who has taken refuge in Moscow since revealing details of secret U.S. government eavesdropping programs in 2013.
Her rival candidates were happy to let "immigrants turn France into a huge squat", she argued.
If no candidate wins more than 50 percent of the vote on Sunday, there will be a run-off election between the two top vote-getters on May 7. Some Muslims feel unfairly targeted by French laws banning headscarves in schools and full-face veils in public.
Tf1 guests normally appear beside an European Union flag tethered to a French tricolour but, unlike rival candidate Emmanuel Macron, Ms. Le Pen insisted that only the French flag should feature alongside her. She said Wednesday that "I am a candidate in the election for the French republic" and said Europe is acting like France's "enemy".
Opponents of Le Pen and her anti-immigration National Front party also skirmished with police outside a Paris rally this week.