In order to characterize the life style and on line game behaviour among different purchase involvement teenagers, questionnaire survey between gender and among educational stages had been conducted on middle school player in Taipei area during spring 2002. Responses of 435 students selected by Quota Proportional Sampling were statistically analysed with descriptive statistics, chi square test, Factor Analysis, Cluster Analysis and Correspondence Analysis. The result includes: (1) Lifestyle and on line game behaviour are significantly different between gender and among educational stages. (2) On line game purchase involvement are significantly different among educational stages. (3) Correlation between consumer behaviour and purchase involvement are higher than those between consumer behaviour and demographic variables as well as those between consumer behaviour and life style. (4) Purchase involvement and lifestyle are moderately correlated.