Additional district and sessions judge of Balasore Ajanta Sarangi also imposed a Rs 9,000 fine on Abhay Kumar Behera of Rahamaganj village.
He would undergo an additional imprisonment of three months if he fails to pay the amount.
Behera had kidnapped the minor girl in 2014 and sexually assaulted her. A case was registered at the Basta Police Station on the basis of a complaint lodged by the victim's parents.