The purpose of this study is to investigate the relationship between personality traits and nominated leadership position of middle school students. The sample consisted of 349 ninth graders from six middle schools. Revised Gordon Personal Profile, Gordon Personal Inventory, Survey Interpersonal Value and a sociometric measure of leadership were administered to all of them. Both boys and girls were classified into three groups, according to their sociometric scores: The top 27% as the high leadership group (H-L), the middle group (46%), and the lower 27% as the low leadership group (L-L). It was found that: (1) Among the bays, the H-L group got significantly higher scores in ascendancy and cautiousness than the L-L group. (2) Among the girls, the H-L group received significantly higher scores in responsibility, emotional stability and benevolence, but lower scores in the expressed leadership and recognition than the L-L group. (3) H-L boys showed a stronger tendancy in ascendancy, recognition and leadership than H-L girls. However, among the entire group of subjects, boys obtained higher scores in original thinking and expressed leadership than girls, but lower scores in personal relation and benevolence. (4) Sociometric leadership scores were significantly correlated with the scores in ascendancy, support, cautiousness, recognition and benevolence.