1. Objectives In oriental medicine, there is no method to diagnosis Sasang constitution of school aged children. The objective diagnostic method is necessary to improve the health condition of children. The method must be able to reduce time and to correct subjective error. So the purposes of this study are developing the questionnaire to diagnosis Sasang constitution of school-aged children. 2. Methods The questionnaire consists of selected substance of ${ulcorner}$Dongyisusebowon${lrcorner}$, characteristic questionnaire of children and questionnaire for the Sasangin Diagnosis Questionnaire(for adult). Experts, element school children and a scholar on Korean literature revise the questionnaire. 3. Results and Conclusion Experts examed pre-questionnaires and selected the final questionnaries by CVI 0.8 at propriety of contents. Sasangin Diagnosis Questionnaire (SDQ) for Child consists of 84 questions (24 questions for child, 48 questions and 12 questions for doctor).