The 71-year-old was taken in for questioning on Sunday afternoon, after a 78-year-old woman reported him to police.
He reportedly broke into her house and raped her. His face was concealed but the women recognised him and went to the police straight away.
While in custody, police also charged him with the rape of an 80-year-old woman which took place in Rennes on August 1.
“The modus operandi was the same: he broke into the house in order to find cash, then sexually assaulted the victim and then left,” said a source at the police station.
According to local paper Ouest France, the man had already spent 20 years in prison for sexual abuse in the 1960s.