Much of the conceptual work in the field of Corporate Social Responsibility(CSR) originated from studies that were conducted in general corporations; however, many issues were peculiar to the area of fashion brand social responsibility. The purpose of this study is to develop a scale to measure the social responsibility of fashion brands in order to establish a specific, scientifically based marketing strategy. Through a literature review that disclosed 59 items regarding CSR and results from focus group interviews and exploratory factor analyses, we developed 23 items pertaining to fashion brand social responsibility. The measurement items were organized into five dimensions: economic, legal, ethical, environmental, and philanthropic responsibility. We found the 23-item scale to have good reliability and validity. We also found that fashion brand social responsibility positively influenced brand loyalty, including repurchase intention, continuance intention, and word of mouth. Thus, strategic planning for social responsibility in regards to fashion brands is essential in order to secure loyal customers, for both domestic and foreign brands compete in the fashion market.