This study aims to determine the influence of green marketing on brand image and the effect to purchase decision. The number of sample used in this study were 200 respondents who customers of The Body Shop in Yogyakarta. Purposive Sampling was used as a sampling technique. Collecting data technique used is survei method with questionnaire. Path analysis was used as a method of analysis to determine the influence of variable involved. The result showed that green marketing has positife and significant effect on brand image, brand image has positife and significant effect on purchase decision, and green marketing has positife and significant effect on purchase decision. The analysis of mediating effect using Sobel test that showed green marketing has positife and significant effect on purchase decision through brand image as mediating variable.