The purposes of this study were to develop Observing Scale of Gifted Behavior which can be used in elementary and high schools and to estabilish morns. Scale for elementary schools was used in grade 1 to grade 6 while scale for high schools can be used in grade 7 to grade 12. The scale has three versions for teachers, parents and students. In order to diminish the influence of observer, the Observing Scale of Gifted Behavior was renamed as Observing Scale of Student Behaviors. The samples used for the norm were 2425 elementary, 1080 junior high, and 960 senior high school students. The scale of high school version has the following facts: Cronbach α.785, reliability of inter-observers .56 (junior high) and .57 (senior high), reliability of test and retest .66, Pearson γbetween subtests and total scores ere .466~.907. The scale of elementary school version has the following facts: Cronbach α.99, reliability of inter-observers .75, reliability of test-retest .87, Person γbetween the scale and academic score was .312~.728, Person γbetween the scale and IQ test was .40. The norm was estabilished only in teacher version for elementary, junior, and senior high schools.