This study aims to determine how much influence of environmental knowledge, environmental conccern, and attitudes toward green purchase intention moderated by gender differences. This research was conducted in D.I. Yogyakarta. The sampling method used in this study is nonprobability sampling, and nonprobability sampling used was convinience sampling. The number of samples in this study as many as 100 people who are car users LCGC Toyota Agya. Data were collected using a questionnaire. The data in this study using multiple linear regression with SPSS. The results of this study prove that environmental knowledge has positive influence to green purchase intention moderated by gender differences. Environmental concern has positive influence to green purchase intention moderated by gender differences. Attitudes has no effect towards purchase intention if it is moderated by gender differences and gender differences has no effect towards green purchase intention.