The purpose of this study was to investigate the differences of clothing majors and non-majors in clothing knowledge and consumption behavior. Subjective and objective knowledge were compared and factors of clothing consumption behavior were analyzed across the two groups. The subjects of this study were female student who went to University in Seoul. Data from 150 college female students were analyzed using SPSS. Results indicated that clothing majors had significantly higher level of clothing knowledge. The differences were smaller for subjective knowledge levels than objective knowledge levels. Clothing majors tended to reform their clothes and coordinate their clothing items better than non-majors. They considered styles more importantly than brands but have some level of conformity. Among clothing consumption behavior factors, reform ability and coordination ability significantly affected clothing knowledge.