Allegations of criminal conduct have been made against UN peacekeeping personnel. While only a small number commit criminal offences, these personnel must be held accountable for their actions. Ensuring accountability is difficult due to jurisdictional issues, including in which jurisdiction (host state, sending state, or third state) to prosecute offenders. However, the possibility of the International Criminal Court exercising jurisdiction over peacekeeping personnel (civilian or military) has not really been considered. This article will examine the potential applicability of the substantive law of war crimes and crimes against humanity under the Rome Statute to crimes committed by peacekeeping personnel.