The main aim of this study is to build and test a model for factors affecting consumers' impulsive buying tendency in shopping malls. The sample size was 1380 Maadi city center visiting customers. The number of valid questionnaires was 1168. The response rate was 84.64%.Data was analyzed using SPSS.16 and Amos.18.This Study examined the relationship between consumers' personal traits, situational variables related to consumers, situational variables related to store, consumers' demographic characteristics and consumers' impulsive buying tendency. Results indicated that there is a significant and positive relationship between shyness, emotional stability, materialism, collectivism and impulsive buying tendency. Results indicated also that there is a significant and negative relationship between individualism and impulsive buying tendency. Results revealed that there is a significant and positive relationship between credit card use, time availability, shopping enjoyment and impulsive buying tendency. Results revealed too that there is a significant and positive relationship between store's sales promotions, store's sales associates and impulsive buying tendency. Results showed that women consumers have greater tendency to impulsive buying than men consumers, young consumers have greater tendency to impulsive buying than old consumers and high income consumers have greater tendency to impulsive buying than low income consumers.