The teenager raped the girl on Saturday, May 1, when she was returning home after grazing the goats in the nearby fields.
"Spotting the girl alone, Dharmendra Sen dragged her to nearby bushes and raped her. He also threatened to kill her if she disclosed the incident to anyone," a police officer said.
The shocked girl informed her parents, who in turn reported the matter to the police.
The culprit is at large.