National Front vice-president Florian Philippot said the party could not accept “such an odious comparison”.
The image, in a video accompanying the song Nobody Knows Me, was followed by another resembling Adolf Hitler.
Madonna was performing at the Stade de France in a Paris suburb on Saturday.
Florian Philippot said the lawsuit would be filed this week.
The video had already appeared earlier in Madonna’s 30-nation MDNA world tour, sparking a warning from Marine Le Pen that she was considering legal action.
Florian Philippot said: “This is just another provocation in Madonna’s world tour so that people will talk about her.
“Marine Le Pen will defend not only her own honor but her supporters and the millions of National Front voters.”
Marine Le Pen won 18% of the vote in the first round of France’s presidential election and has tried to remove extremist elements and crack down on anti-Semitism.
However, the National Front won only two seats in the 577-member National Assembly in last month’s general election.
Madonna is due to perform in France again on 21 August, in Nice.
The US House Ethics Committee has voted to release its report on former Republican Representative…
ABC News has agreed to pay $15 million to President-elect Donald Trump to settle a…
South Korea’s parliament has voted to impeach President Yoon Suk Yeol over his failed attempt…
Israeli war planes have carried out more than 100 air strikes in Syria on December…
President-elect Donald Trump has threatened to impose 100% tariffs on the BRICS countries if they…
Syrian troops have withdrawn from the city of Aleppo following an offensive by rebels opposed…