Sports have their culture and customs and those cause legal responsibility exemption sometimes However, if such an accident occurs in life sports where the legal responsibility is not systematically managed, it can be a severe problem. The accident could bring a legal problem which is not easy to solve for conflict sports’ autonomy and the legal application of the actual law. With this reason, a point of reference, could judge the legal responsibility is right or not, is required, the social reasonability is used as the basic point. Social reasonability is defined as a criterion for acknowledging that any action that requires judgment on a social norm is included in the scope, and it could be used as a legal reason for the exemption from punishment or liability. The courts also have defined the exemption scope of legal responsibility in the life sports with the social reasonability. On the case of the severe injury on spinal cord that occurred in a life football game, the Supreme Court of Korea sentenced responsibility exemption for the social reasonability of sports. However the judgement seemed too harsh for the plaintiff to the defendant who acquired a physical disability due to damage of neck spinal cord. In the other hand, the Supreme Court of Korea sentenced differently on the case of the life sports golf game, golfer’s ball was heat the golf caddy’s face and she got severe in severe injury. It is also considerable significance for the court s protection against the infringement of the legal interests of the relatively weak game assistants regarding the social class between golfers and the caddy in Korea.