Criminal responsibility in the international arena has many forms. Individual criminal responsibility, criminal responsibility in the light of joint (collective) criminal activity, and responsibility of commanders and superiors are three common forms of criminal responsibility. In fact, in this field; the general principle of individual criminal responsibility according to the nature of international crimes has been accompanied by exceptions that criminal responsibility resulting from joint criminal activity and criminal responsibility of commanders and high-ranking officials are two examples that are imposed in international criminal courts in order to impose criminal responsibility. They are cited as perpetrators of international crimes. The present study, which was written in a descriptive-analytical method with the aim of "examining the criminal responsibility of the perpetrators of the assassination of Sardar Soleimani based on the three forms of international criminal responsibility", comes to the conclusion that: the criminal responsibility of the perpetrators of a terrorist act leading to martyrdom General Soleimani and his companions, in the form of all three forms of criminal responsibility, i.e. 1- individual criminal responsibility, 2- criminal responsibility in the light of joint (collective) criminal activity, and 3- the responsibility of commanders and superior officials, and depending on the way of participation and interference or The lack of involvement of the perpetrator in the material operations determines the form of criminal responsibility