Instead, the 28-year-old has only been charged with sexual abuse of a minor.
"Essentially they judged that she had consented to the sexual encounter because she was not physically forced into the act," The Local reported.
Rights group Le Voix de l'Enfant said in a statement: "The question of consent or its absence should never even be asked when it comes to rape victims who are minors".
The girl's mother told the Mediapart websites she was shocked the rape charge had been dropped to the lesser charge of sexual abuse of a minor.
"She thought it was too late, that she didn't have the right to protest, that it wouldn't make any difference, so she went into autopilot, without emotion and without reaction," the mother said.
There are now calls for French legislators to introduce a legal age under which sexual consent cannot be presumed.