Bosko Drljaca (38) from Bosnian town of Prijedor has been arrested on suspicion of sexually abusing fifteen-year-old girl from mid-2014 to March this year.
Suspect and 15-year-old girl with intellectual disability live in the same household, but are not related.
The information was confirmed by Prosecution in Bosnian city of Banja Luka, where he was heard.
Drljaca was detained and is facing a sentence of ten or more years in prison.
Media report they are both from socially vulnerable families.