The French banker found guilty of his role in a rogue trading scandal at Societe Generale says he's not responsible for the massive losses has been made a scapegoat.
Jerome Kerviel began his appeal in Paris on Monday against a three-year prison sentence.
In 2010, the ex-trader was convicted of forgery and breach of trust and handed a five-year prison sentence, with two years suspended, the BBC reports.
Kerviel, who was also convicted of unauthorised computer use, said his bosses knew what he was doing.
The appeal hearing is expected to last for the whole of June.