The objectives of this study are to examine the propensity of materialism of adolescent consumers, to investigate the effects of demographic variables and socio-psychological variables on materialism of adolescent consumers. The survey of this study was conducted by means of self-administered questionnaire with 483 adolescent consumers attending middle school located in Inchon. Major findings are the following : (1) The propensity for materialism of adolescent consumers averages 31.18. This score is beyond the middle slightly. (2) According to the results for examining the relative influences of variables affecting materialism of adolescent consumers, the relative importance of related variables are in the order of ; affecting degree of their friends, the degree of taking in advertisement, affecting degree of school consumer education. Explanatory power of these variables totalled 25.7%.