The purposes of this study were to: 1) study the role of school administrators of the education sandbox of Trat Province, 2) study the curriculum development in these schools, 3) study the relationship between the role of school administrators and the curriculum development in these schools, and 4) create an equation forecasting the role of schools administrators affecting curriculum development in these schools. The sample was a group of 291 teachers. The research instrument was a two-part, five-rating scale questionnaire. The first part was about the role of school administrators of the education sandbox of Trat Province with a reliability of 0.83. The second part was about curriculum development in these schools with a reliability of 0.81. The statistics used for data analysis were: mean, standard deviation, Pearsons correlation coefficient and simple regression analysis.