The pensioner from a neighbouring village in Qiyang, Hunan province, China has been arrested by police for the crime after DNA evidence reportedly revealed he was the father of the baby girl.
But the child has denied she was defiled by the man.
Her family believe that the pensioner was forced to confess as part of a police cover-up.
They believe that DNA was not taken from any of the three teachers to see if they fathered her daughter.
The girl also claims that at one point during the investigation she saw the three teachers in question handing money over to the police.
She claims she was also threatened by the headteacher of her school to keep quiet.
The 74-year-old man has been sentenced to 12 years in jail.