The title of this graduate thesis is the examination of the witness and his evidence value. According to the Code of Criminal Procedure witness examination constitutes a form of evidence, one of the most common, whether requested by the defendant or the prosecutor, or the body who conducting the procedure. The lawmaker has foreseen it as a means to establish facts and enable effective ending and conclusion of the criminal procedure. Witness examination is defined in Articles 283-301 of the Code of Criminal Procedure. Witness can be examined in the investigation phase or during criminal proceedings. In the investigation phase witness is examined by the state attorney, while during criminal proceedings witness can be examined by the state attorney, defendants and his/her attorney as well as the body responsible for leading of the proceedings. If the witness is a member of a vulnerable group, such as a child or a victim of the criminal act he/she should be treated in a careful manner which takes into account their psycho-physical condition. The defendant cannot be a witness in the criminal proceedings. In addition, these categories of persons cannot be examined: 1) persons who would violate their legal duty of keeping secrecy of data until they are released of such duty by competent body; 2) defence attorney, unless the defendant asks him/her so; 3) defendant in the proceedings ; 4) religious official about the content of confession. The body leading the proceedings can test the credibility of the witness statement by presenting to her/him the previous statement, asking questions or making him/her face another witness or defendant.