In order for the victim to fully recover the damage caused by the crime in the criminal procedure, he/she must be able to participate with the legal status of the litigant. However, there are many limitations in participating in criminal proceedings because the victim is still in the position of a witness within our criminal justice system. The victim's right to read and copy investigative documents, one of the means of participating in criminal proceedings, is a type of right to collect information based on the constitutional right to know, and is the right to read or receive copies of information held and managed by criminal justice agencies. The Korean Criminal Procedure Act has no basis of applying for and providing information on investigative documents before filing a prosecution, but it is possible to view and copy them on specific cases under investigation through the special law such as ‘Information Disclosure Act’ and ‘Sexual Violence Act’ in Korea. In practice, the criteria for permission and restriction of reading and copying investigative documents are prepared as a form of legal orders and administrative rules, allowing victims to read and copy the documents. However, since there is a ruling that it is unconstitutional and illegal to restrict the victim's right to information in sub-laws without a basis for delegation under the higher law, it is necessary to prepare permission requirements and grounds through its delegation for reading and copying investigative documents. In addition, it will be difficult to upgrade the status of victims to the same level of litigation as Germany and France, but it is necessary to allow them to participate in the lawsuit, guaranteeing the right to appoint lawyers, and providing appropriate remedies, while imposing legal responsibility on the victims who use them for other purpose.