This study Performed to attain some useful data for physical education class by comparing physical developments and physical fitness with personality and fundamental Interpersonal Relation Orientation Behavior of middle school boys. Results of the study can be summarized as conclusions with following persentions. 1. Impulsiveness in personality factors showed 36.19% 2. Dominance and Sociability showed no significant indicantion. 3. Those who were relatively big in body size, in general, showed objectivity. 4. Corelation between height, weight, and physical fitness and personality showed a highly significant. 5. Objectivity group showed high scores in physical fitness test and relatively big in body size. 6. General activity groups were in high rank in physical fitness test. 7. The affection behavior turned out more positive than others. 8. Positive group was physically better developed in wanted inclusion behavior. 9. Negative group in expressed control behavior was in higher rank in physical fitness test. 10. Generally speacking, positive group was higher in rank than negative one.