Appraisal right is one of the most controversial topics addressed in corporate restructuring area in Republic of Korea. Even though the right is originated from the United States, there are some characteristics in Korea appraisal laws. One is appraisal price, and the other is the lack of market out exception. A shareholder who opposed the resolution of the board of directors with respect to triggering events may request the corporation to purchase the stocks she/he owns on the price determined by ``Financial Investment Services and Capital Markets Act`` or as an alternative ``court decision``. The price calculated in a manner falling under each of the following items : Average of final quotations of the stocks traded on the securities exchange and disclosed on a daily basis for two months, one month, and one week before the day immediately preceding the date the resolution of the board of directors is made, weighted by trading volume by real transactions. Market out exception is not imported in South Korea. The author introduces the function of appraisal rights and the premise of market out exception as well as the market-out exception provisions both of the Delaware state``s general corporation act and Model Business Corporation Act. The author appraises current Korean appraisal laws and the possibilities of importing market out exception in Korea appraisal laws.