The purpose of this study were 1) to identify the differences between homosexual and heterosexual men in clothing behaviors(fashion leadership, preference for up-to-date style and sexual attractiveness), lifestyle and sex-role attitudes, and 2) to investigate the relationships between clothing behaviors and lifestyle and sex-role attitudes. The data was collected via self-administered questionnaires from 183 adult men(88 homosexual, 95 heterosexual men) living in Seoul, and was analyzed by factor analysis, t-test, correlations and multiple regressions. The result of this study were as follows: 1. Two factors of fashion leadership were identified: fashion opinion leadership and fashion innovativeness. Four factors of lifestyle were identified: appearance awareness, self-confidence, authoritativeness, and achievement. 2. The result of t-test between homosexual and heterosexual men in clothing behaviors and psychological characteristics, homosexual men showed higher scores in fashion innovativeness, fashion opinion leadership, preference for up-to-date style, and appearance awareness of lifestyle characteristics. 3. From the result of analyzing the effects of psychological characteristics on 4 variables of clothing behaviors, appearance awareness of lifestyle characteristics was found to be the most influential factor for all the clothing behavior variables in both groups.