The purpose of this study is to define the relationship between characteristics and sports additions of marathon club members, enable them to participate in right, helpful daily sports activity, let them know they can give positive effects to life and improve real life qualities and provide basic data for forming right exercise habit of daily sportsman in order to improve general life level of individual and improve and activate welfares of people. For the purpose, questionnaire was performed through convenience sampling method for 300 participants of more than 20 years old, who participated in 2010 Busan Marathon. Among them, 269 persons were adopted for actual data analysis. For data processing method, SPSS 18.0 Version was used to perform reliability analysis, factor analysis, correlation analysis and multiple regression analysis. The significance levels of all statistic values were α=.05. The study results through empirical analysis are as follows. First, it was found that the characteristics of marathon club members(nerve, sincerity, extroversion, openness, good feeling) gave positive effects to the sub factor of sports addiction, withdrawal symptom. Second, it was found that the characteristics of marathon club members (sincerity, extroversion, openness) gave positive effects to the sub factor of sports addiction, sports desire. Third, it was found that the characteristics of marathon club members (sincerity, extroversion, openness, good feeling) gave positive effects to the sub factor of sports addiction, emotional attachment.