Background and Aims: The objectives of this research are as follows: 1) to study and compare student affairs administration of educational institution administrators under the Bueng Kan Primary Educational Service Area Office. Classified by position Education level and the size of the educational institution. 2) To compare student affairs administration among educational institution administrators under the Bueng Kan Primary Educational Service Area Office. Classified by position education level and the size of the educational institution. And 3) to study guidelines for developing student affairs administration among educational institution administrators under the Bueng Kan Primary Educational Service Area Office. Methodology: The sample in this research consisted of 331 school administrators and teachers. The sample size was determined according to Krejci and Morgan's table. Using the stratified random sampling method. The research tools consisted of a questionnaire with 5 rating scales and an interview form. Which has a consistency index between 0.80 - 1.00 and a confidence value for the entire questionnaire equal to 0.89. For data analysis, statistics such as frequency, percentage, mean, and standard deviation were used, as t-tests and F-tests. Results: The results of the research found that: (1) the level of student affairs administration of educational institution administrators under the Bueng Kan Primary Educational Service Area Office. Overall and in each aspect are at a high level. (2) Comparison of opinions regarding student affairs administration among school administrators under the Bueng Kan Primary Educational Service Area Office. Classified by position Education level and the size of the educational institution It was found that overall and in each aspect there were no differences. (3) Guidelines for promoting the development of student affairs administration for educational institution administrators under the Bueng Kan Primary Educational Service Area Office, consisting of 6 areas: 1) promoting guidance activities in educational institutions, 2) promotion of health, sports and recreation, 3) promotion of boy scouts, girl guides, and red cross youth activities, 4) promotion of democratic activities and student discipline, 5) promoting and developing student councils to strengthen student and youth organizations in educational institutions; and 6) promoting the protection of children's and youth's rights. Conclusion: According to the findings, Bueng Kan school administrators perform well in all aspects of student affairs administration, with no significant differences based on position, education level, or institution size. It also outlines six key strategies for improving student affairs: promoting guidance, health, and recreational activities, developing leadership skills through scouting and democratic initiatives, strengthening student councils, and protecting children's rights.