This research aimed to study of the style of administrationof administrators, the educational qualitive and the forecast algebraic equation of administrative style effected to educational qualitive of basic educational school under Chonburi educational service area office III. The sample of this study consisted of 369 institution administrators and teachers. The instrument used in this research was a questionnaire with 5 rating scales. The statistic used for the data analysis were percentage, mean, standard deviation, correlation coefficient and multiple regression analysis. The results were as followed:
	1. The style of administration of administrators the basic educational school under Chonburi educational service area office III in general were at moderate level. When considered in each aspect, we found that, the democratic style was high level, The autocratic styleand the laissez-faire style were at moderate level.
	2. The educational qualitive of basic educational school under Chonburi educational service area office III, in general and each aspect were at high level. It was ranked from high to low were administrators, teachers and students, respectively.
	3. The style of administration of administrators the basic educational school under Chonburi educational service area office III, the democratic style have positive effected to educational level with educational qualitive in general. The laissez-faire style have positive relation in low level with educational qualitive. The autocratic style, it was not found  relative with educational qualitive in significant at level of .05
              	4. The forecast equation of administrative style effected to educational qualitive of basic educational school under Chonburi educational service area office III. We can write in raw score as followed: 
y = 1.848 + .424 (X2) + .008 (X3)
