Objective : This study is to verify the construct validity of the sensory processing assessment tool for schools, Rasch analysis was used. Methods : An evaluation was conducted with teachers of general elementary schools teaching first to sixth grades nationwide to verify the validity of the sensory processing assessment tool for schools. In order to distinguish between the general group and the suspected ADHD group, the Korean version of the ADHD Scale for teachers was also requested. The final evaluation was conducted on 294 people, of which 206 were in the general group and 88 were in the suspected ADHD group. For subsequent analysis, Rasch analysis was performed. Results : Through the Rasch analysis, 5 unsuitable subjects were excluded and 9 unsuitable questions were deleted. Accordingly, the completed evaluation tool consisted of a total of 78 questions. The rating scale was modified to a 3-point scale, and the reliability of item separation was judged to be excellent, and the reliability of subject separation was judged to be acceptable. Conclusion : Through this study, it was confirmed that the construct validity of the sensory processing assessment tool for schools was excellent. Therefore, based on the results of this study, it is expected that it will be useful in selecting students with sensory processing difficulties at school.