The purpose of this study was to identify the existing relationships of the elementary school principals' and teachers' perceptions of the elementary school principal's role behavior in Ubon Province, Thailand. This study answers four questions: Are there significant differences in perceptions of teachers in each of the thirty-four surveyed schools of the principal's role behavior; Are there significant differences in perceptions of all teachers among the thirty-four surveyed schools of the principal's role behavior; Are there significant differences in perceptions of all principals of the principal's role behavior; Are there significant differences in perceptions of all teachers and principals of the principal's role behavior?