The Office of National Security (Korean: 국가안보실; Hanja: 國家安保室) assists the President of South Korea.

The director often serves as the counterpart of National Security Advisor of the United States.

Moreover, the director serves as the chairperson of the standing committee of National Security Council, which is established by Article 91 of the Constitution and chaired by the President, whilst its first Deputy Director serves as the Council's secretary-general.

[1] The very first attempt to install a control tower to oversee the national security issues within South Korean government was initiated in Roh administration.

This is the organization of the National Security Bureau with the names of the current senior officials placed in each position.