This study was conducted to investigate the effects of wearing behavior of clothing and dietary behavior, and psychological characteristics on the obese children. For this purpose, the questionnaire method was used and the subjects were 1,501 elementary school children in the 4th to the 6th grade and their mothers (1,459), in Seoul, Busan, Daegu, Gwangju, and Andong cities. The children were divided into two groups, such as a normal weight group (NWG) and an obese group (OG). There were significant differences in adaptability to the cold and the heat, and in wearing behavior of clothing for body shape between NWG and OG. Scores for balanced dietary behavior was higher in OG than in NWG while dietary control perceived by their mothers was better in NWG than in OG. Stress was lower and self-esteem was higher in NWG than in OG. Experimental tests are needed to analyze the behavior of obese children on the basis of the obtained results of this study.