The Pokhara High Court overturned the Kaski District Court's verdict which had absolved Laxman Khawas of rape charges and given him a clean chit.
The victim's family had accused Khawas of raping the 14- year-old girl on the pretext of teaching her mathematics.
A division bench of justices Achyut Bista and Balachanda Sharma sentenced him to nine years in prison and imposed a fine of Rs 75,000.
It is alleged that following the incident, Khawas coerced the girl's family to sign an agreement not to disclose the case in return of financial gains.