The prosecution case was that the 24-year-old man had abducted the ninth standard student while she was returning from school in Sethumadai and raped her in 2012.
Based on a complaint by her father, the man was arrested.
Trial in the case had been going on since February this year.
Delivering the judgement, Judge M P Subramanian convicted and sentenced the man to seven years RI.
He also slapped a fine of Rs 2,000 on him, failing which he has to undergo an additional six months' imprisonment.