The purpose of this research was to study the administrative factors affecting environmental education in schools under Chachoengsao Educational Service Area Office 2. The samples composed of 320 administrators and teachers  from  schools under the jurisdiction of Chachoengsao Educational  Service Area Office 2 were obtained by stratified random sampling and multi-stage random sampling. The instrument was a five-scale-questionnaire. The statistics used in analyzing the data were mean, standard deviation, and multi-regression analysis to construct a regression algebraic equation. 
   	1) The overall administrative factors were at a moderate level. When considered separately, the external and internal factors revealed that  the overall external factor consisted of economics, sociality, culture, science, technology, politics, law and environment were  found at a moderate level. The internal factor consisted of personnel, budget, facilities and management were at a high level. 
        	2) The overall aspect of environmental education were found at a moderate level. When considered separately, the result revealed that the aspects of instructional planning, instructional aids and learning resource implementation, curriculum, implementation, learning and teaching process, learning and teaching process, learners activities and evaluation-assessment process were ranked by mean scores respectively.
        	3) The administrative factors affecting environmental education, when considered the external factors revealed that the aspects of politics, law, sociality, culture, environment affected on the administrative environmental education were found statistically significant difference at .05 level, and was able to predict for success of 54.50 percent. When considered the overall external factors revealed that the aspects of management, facilities and personnel affected on the administrative environmental education were found statistically significant difference at .05 level, and was able to predict for success of 77.20 percent.
