The criminal acts of corruption are categorized as extraordinary crimes because the impacts are extraordinary, which has been done in a systematic and coordinated way, it is necessary to witness the perpetrators who know directly and directly involved in a corruption case called justice collaborator. This study aims determine the a legal protection of the perpetrators as the justice collaborator in the field of extraordinary crime especially corruption crime in Indonesia. This study used normative legal research. The result of this study showed that the legal regulations in Indonesia regarding in justice collaborator on the Law No. 13/2006 which was renewed by law No. 31/2014 on Witness and Victim Protection is regulated in Circular Letter of Supreme Court No.4/2011 on Treatment of Criminal Offenders (Whistle Blower) and The Perpetrators Who Cooperate In Certain Criminal Acts (Justice Collaborator). The conclusion drawn from this study is that the justice collaborator entitled to get the legal protection despite being an exceptional criminal offender of extraordinary crime such as corruption crime because they have assisted legal investigators to reveal the others perpetrators involved in the case of this extraordinary crime.