Macron was seen winning 26 percent of the vote in the April 23 first round followed by Le Pen on 25 percent, according to the poll for France Televisions.
Both scores were unchanged from the last time the poll was carried out two weeks ago, even though it was carried out after the two traded barbs in a televised debate on Monday involving all the main candidates.
Conservative candidate Francois Fillon saw his score slip to 18 percent of the first round vote from 20 percent as he struggles to limit the damage from a series of financial scandals.
Meanwhile, far-left candidate Jean-Luc Melenchon saw his share of the vote rise to 13.5 percent, surpassing for the first time the score for the ruling Socialists candidate Benoit Hamon at 12.5 percent.
The poll was conducted on March 21-22 among 6,383 voters.
(Reporting by Leigh Thomas, Editing by Hugh Lawson)
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