The purpose of this study was to determine the effect of lifestyle, trust, convenience and quality of information on online purchasing decisions. This research uses quantitative research methods, non-probability sampling techniques, obtained through purposive sampling is a method of determining the sample based on certain criteria. This research sample of 120 respondents. The research method used in this study is multiple regression analysis. The results of the analysis show that partially convenience and quality of information have a significant effect on purchasing decisions, while lifestyle and trust has no influence significant on online purchasing decisions. Furthermore, the results of the simultane ous analysis show that lifestyle, trust, convenience and quality of information affect on online purchasing decisions.