The purpose of this study was to determine the influence of Lifestyle, Brand Image, Product Quality, Social Media Marketing and iPhone Purchase Decision. Selection of the sample in this study using purposive sampling. Based on the criteria, 110 respondents were sampled. The data analysis technique used in this research is instrument test, descriptive statistics, classical assumption test, multiple regression, and hypothesis testing. The results of the analysis show that Lifestyle, Brand Image, Product Quality and Social Media Marketing simultaneously influence Purchasing Decisions, then partially Brand Image, Product Quality and Social Media Marketing have a positive effect on purchasing decisions, but Lifestyle has no effect on purchasing decisions.