The inmate, who took two prison guards hostage surrendered to law enforcement agencies, Justice Minister Eric Dupont-Moretti said on Tuesday.
"The hostage incident is over. The prisoner surrendered," Dupont-Moretti wrote on Twitter.
The minister thanked operational services for their effort, and extended support for the prison guards.
The man, who was serving life for rape and murder, had wanted his sentence to be reconsidered.
The guards taken hostage were a man and a woman, AFP reported, citing sources. The male guard was wounded in the eye.
The last hostage-taking situation to have taken place in a French prison happened in 2019, also at the Condé-sur-Sarthe prison. On 11 June 2019, a prisoner named Francis Dorffer, who the French media at the time dubbed a "serial hostage taker", took a guard and a trainee guard hostage using a homemade weapon, and held them in his cell for five hours.