Criminal Procedure Law is an introductory kuhap application that discusses the procedures for litigation in criminal proceedings from the initial stage of seeking the truth to the level of cassation in the Supreme Court even up to the stage of implementing a court decision that has been submitted. With this application every reader is expected to know, understand about the meaning, history, principles, position, function and scope of criminal procedural law in Indonesia. In addition, it can also understand the duties and authorities of the Attorney / Police as investigator, the Public Prosecutor as executor. Understand and know about the stages of criminal procedure law at the level of investigation as a sub-function of investigation, arrest, detention, search, examination of letters, pre-prosecution, prosecution, examination in court, evidence in criminal procedural law, understanding of evidence, evidence and so on, Thus, readers who read this introduction to "KUHAP" are expected to really be able to apply the basic principles of criminal procedural law as a procedure in handling cases.