Nineteen-year-old Gianluca Monni, who has no criminal record, was shot at least three times at about 7:30am as he waited for the bus to take him to his high school in the centre of Orune, in the Sardinian province of Nuoro.
He was shot by two men who escaped in a car after the murder, according to the Italian newspaper Il Fatto Quotidiano.
Other students were waiting with him at the time of the murder. They are now helping police to identify the killers.
Monni was a student at the Alessandro Volta professional institute in Nuoro, where his brother also studied.
His father is the owner of a business selling animal feed and his mother works at the local hospital, according to the paper.