This study was conducted to analyze about trait of learning disabilities as operationally defined by teachers\' clinical decision. Participates in the study were 668 students(3~4 grade) and 22 teachers of elementary school. Several instruments were administerd, including the Cognitive ability Test and Korean language Test in Achievement-Cognitive Ability Endorsement Tests, a written inquire for teachers\' clinical decision. Descriptive statistics, independent-samples t-test and ROC(receiver operating characteristics) curves analysis were conducted to comparing learning disabilities and non-learning disabilities as operationally defined by teachers\' clinical decision and to comparing learning disabilities as operationally defined by teachers\' clinical decision and by discrepancy models(standard score comparison model, regression discrepancy model). The results of this study were as follows: First, it revealed that difference between learning disabilities and non-learning disabilities as operationally defined by teachers\' clinical decision was significant on cognitive ability, korean language ability, each discrepancy score of standard score comparison model and regression discrepancy model. Second, the ratio of agreement between learning disabilities as operationally defined by teachers\' clinical decision and by discrepancy models were low.