In the day-to-day practice of answering questions from the area of medicine today, there is a growing need for forensic medical expertise in bodily injuries in criminal procedure. Furthermore, when qualifying a bodily injury, the expert must possess knowledge and experience not only medical, but s/he must also be aware of the legal requirements and norms of the Code of Criminal Procedure and the Criminal Code of R. Macedonia. This will enable the expert to contribute to the explanation and clarification of certain facts and issues relating to the bodily injury. In this paper, by citing Articles 255 and 256 of the Code of Criminal Procedure, it is explained how an expert can be appropriately selected by the court. In addition to this, by citing Article 271 of the afore-mentioned Code, a way of analysing bodily injuries is defined; and finally, the definition of bodily injuries is explained through citing Articles 130 and 131 of the Criminal Code of R. Macedonia, relating to bodily injury and grave bodily injury. The aim of this paper is to outline the method of performing this forensic medical expertise, i.e. by whom and when can expertise in bodily injuries be sought and, moreover, what is the legal and ethical responsibility of the expert during the execution of the expertise. Additionally, the steps that the expert should follow when preparing a written statement and opinion on the type of the bodily injury are explained. More specifically, emphasis is placed on the expert's requirements after examination of the injured individual; after revision of the medical documentation during expert assessment of bodily injuries in the case of criminal subjects; and providing oral statements and opinions during the criminal procedure.