Husamettin Dogan, sentenced to nine years in prison last December, denies he intended to rape Pelicot.
He argues that he was deceived by Dominique Pelicot, Gisele Pelicot's ex-husband, who drugged his wife and offered her to strangers online before filming the assaults.
The 44-year-old construction worker goes on trial Monday in Nimes, in southern France, on charges of aggravated rape by administering substances that impair judgment or self-control, an offence carrying up to 20 years in prison.
He remains free pending the verdict. Prosecutors had sought 12 years at his first trial, but the court imposed nine.
In the original proceedings, Pelicot's ex-husband and 50 other men were convicted of sexually assaulting her between 2011 and 2020 while she was under chemical submission.
Dominique Pelicot was sentenced to 20 years in prison, while sentences for other defendants ranged from three to 15 years imprisonment.
The trial drew international attention after Gisele Pelicot opposed a closed hearing, a demand made by several defendants. The court sided with her.
The evidence included stomach-churning homemade videos of the abuse that Dominique Pelicot filmed in the couple's home in the small Provence town of Mazan and elsewhere.
"I have nothing to be ashamed of. Shame must change sides," she said on the trial's opening day.
After the verdict, she declared she had "never regretted that decision" and thanked supporters who gave her the "strength" to return to court each day.
Pelicot has since become a symbol of the fight against sexual violence and the shocking case spurred a national reckoning over rape culture in France.
Dominique Pelicot admitted his role and did not appeal his 20-year prison sentence, now final.
He is expected to testify during the appeals hearing after being implicated by the remaining defendant.
Of the 51 convicted men, 17 initially filed appeals. Most of those were withdrawn and only Dogan pursued his appeal.
While last year's trial stretched over four months, the retrial is scheduled to last no more than four days, with a verdict expected on Thursday.
Civil proceedings in Avignon are due in November to settle damages owed to the main victim and her family, to be paid jointly by the convicted men.
1800 RESPECT (1800 737 732)
National Sexual Abuse and Redress Support Service 1800 211 028
