The purposes of this study are to know: 1) the retail marketing mix and internal envirinment of the individual and decision process to buy the products at minimarkets in padang city 2) the influence of ratail marketing mix and internal environment of individual against the decision process to by the products at minimarkets it padang city. this tudy uses management science approach especially the service marketing. the type of this research is descriptive and verificative, while the methods used both decriptive and verificative survey. investigation type is causality and time horizon is cross sectional using purposive sampling technique. the sample size were 95 respondent at minimarkets in padang city. the data analyzed by descripive analytic and multiple linear regression. the result of study show: 1) indicators of retail marketing mix and internal environment and decision process to buy the products at minimarkets in padang city in general have medium score, 2) retail marketing mix and internal environments factor have significant influence simultaneously toward to buy the products at minimarkets in padang city.