The purposes of this research were: to study the level of participatory management and the level of quality of the learning environment in schools of Chanthaburi Primary Educational Service Area Office; to study the relationship between participatory management factors and learning environment in schools; and to calculate a predictive equation of the factors of participatory management which affect the quality of the learning environment. The sample of 330 teachers in the 2016 academic calendar year was chosen by simple random sampling. The research instrument was a two-part, five-rating questionnaire. Part 1 consisted of 71 items regarding participatory management, and it had a reliability of 0.60-1.00, a discrimination of .32-.78 and reliability of .99. Part 2 consisted of 32 items regarding learning environment, and it had a validity of 0.60-1.00, a discrimination of .42-.80, and a reliability of .99. The data were analyzed by using statistical computer program to calculate the percentage, mean, standard deviation, Simple correlation and stepwise multiple regression analysis.