This research aims to study the transformational leadership of administrators, learning organization of school and the transformational leadership of administrators affecting to learning organization of schools under Chachoengsao primary educational service area office 2. The samples of this study consisted of 425 teachers and administrators. The instrument for collecting data was a questionnaire. Statistics were percentage, Mean, Standard Deviation, Pearsons Product Moment Correlation Coefficient and Multiple Regression Analysis : method enter were employed for data analysis.
	The research results were as followings: 
	1. The transformational leadership of administrators under Chachoengsao primary educational service area office 2 as a whole was at a high level, ranking by the mean scores from high to low; there were idealized influence, individualized consideration, inspirational motivation and intellectual stimulation.
	2. The learning organization of schools under Chachoengsao primary educational service area office 2 as a whole was at a high level, ranking by the mean scores from high to low ; there were team learning, building shared visions, mental models, personal mastery and systems thinking.  
	3. The transformational leadership of administrators affecting to learning organization of school under Chachoengsao primary educational service area office 2 was intellectual stimulation, individualized consideration, inspirational motivation and idealized influence the regression equation standard score was following: 
Z'y = .297X3 + .20X4 + .205X1 + .196X2  
