This research aims to study the quality of teachers work life, the effectiveness of schools and the quality of teachers work life affecting to effectiveness 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, Pearson,s Product Moment Correlation Coefficient and Multiple Regression Analysis : method enter were employed for data analysis. The research results were as followings:
	1. The quality of teachers work life 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 constitutionalism, social relevance, social integration.
	2. The effectiveness 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 the ability to problem solving, adaptation to environmental constraints, generate more positive student attitudes.
	3. The quality of teachers work life affecting to effectiveness of schools under Chachoengsao Primary Educational Service Area Office 2. That could predict was the total life space, constitutionalism, safe and healthy environment, growth and security, social integration the regression equation standard score was following: Zy=.266X7+.231X6+.172X2+.156X4+.137X5
