The International Criminal Court, as the most important supranational judicial authority competent to deal with international crimes, has tools and mechanisms under its statute or, in practical practice, uses methods to provide practical support to victims in order to secure and guarantee their rights and interests. One of these methods is the participation of international non-governmental organizations active in the field of human rights, and among these organizations, the International Red Cross is one of the most important institutions and authorities. In this article, an attempt has been made to discuss and examine the functions of the International Red Cross as a supportive and helpful institution (friend of the court) towards victims of international crimes in the International Criminal Court and in the proceedings of this supranational judicial authority. The overall conclusion is that the International Red Cross, based on an intellectual model and a scientific theory called "friend of the court/assistant of the court", has tried, especially in the last decade, to cooperate more closely and coherently in order to provide and guarantee better conditions for victims of international crimes in terms of providing consultations in various legal-judicial, emotional-physical, psychological-cognitive fields, etc., as well as realizing the judicial rights of victims in international criminal proceedings before the Court, including compensation for damages and healing of the pain caused, requiring criminals to apologize to the victim, implementing restorative processes, etc. However, despite this position and function, some important shortcomings in the performance of this organization in interacting with the Court in the field of protecting the rights of victims are evident.