The purpose of this study was to analyze anti-counterfeiting strategies of fashion firms in Korea. Data was collected by in-depth interviews for 25 fashion firms and 5 buying offices who had been victims of counterfeiting. The result showed that fashion firms recognized the counterfeiting, especially deceptive counterfeiting, as a serious problem in Korea and seek for stronger protection. Fashion firms adopted diverse strategies for the protection of trademark and for the protection of design； (1) Investigation and Surveillance, (2) Warning, (3) Prosecution, (4) Lawsuit, (5) Consumer education (6) High-tech tabooing, (7) Provide incentives, (8) Penalty, (9) Do nothing. Despite the diverse efforts, they proposed the most desirable strategies to deter the counterfeiting as the changes of consumer attitude and stronger legal protection.