Government ships, the ships owned by a state and operated for non-commercial purposes (hereinafter, government ships) are entitled to sovereign immunity. In accordance with sovereign immunity under traditional international law, states enjoy immunity from the jurisdiction of courts of another state. Sovereign immunity is the general principle accomplished through judicial cases and international treaties since the 19th century. The problem is that the restriction of jurisdiction on foreign government ships in Korean jurisdictional waters is a considerable threatening factor on the maritime security situation. In spite of dubious intention of foreign government ships, the counter measures should be limited because of sovereign immunity.