The incident took place last night at Amangal village.
The accused was identified as Rafeeq Hussain, a labourer.
He allegedly took the girl, who lives in the same area, to a deserted place when she was playing outside her house and raped her, sub-inspector Sai Kumar said.
He was arrested after the parents of the girl filed a complaint.
Hussain was drunk at the time, Kumar said. Further probe is on.