The purpose of this study is to examine the current legal system for the protection of the Olympic symbol and to suggest the revision of PyeongChang Olympic Games and Paralympic Games Act (hereafter, ‘Pyeongchang Olympic Act’) for the reasonable protection of Olympic marks in Korea. As a result of examining current laws such as Copyright Law, Trademarks Law, Unfair Competition Prevention Act, National Sports Promotion Act, and Pyeongchang Olympic Act, which are related to the protection of Olympic marks, It can be seen that the activities of using expressions or images linked in a very indirect and circumventive way for the sake of avoiding it is not easy to regulate. As a result of examining the foreign legislations to protect the Olympic marks, it is almost common to extend the scope of the mark not only to the protection of the Olympic Games and similar marks for the strong protection of the Olympic marks, It can be seen that the burden of proof is eased so that remedies can be taken quickly. In the situation that the PyeongChang Winter Olympic Game is at the forefront, This study suggests some legal improvements of Pyeongchang Olympic Act to provide a reasonable protection of Olympic marks. First, the scope of the Olympic linkage marks is defined to be broader and clearly defined by specifying related terms. Second, it stipulates rules for prohibiting the Ambush marketing and provides a basis for direct regulation of such activities. Third, It is necessary to mitigate burden of proving the possibility of confusion. Fourth, the Criminal punishment is strengthened at a higher level than the current level in the case of Ambush marketing for a certain period. Fifth, It is necessary to prepare guidelines for the fair use of Olympic linkage marks.