The populations were 11,460 undergraduate students of Ubon Ratchathani Rajabhat University of the first semester of 2022. The Multi-Stage Random Sampling technique was employed to gather the sample for 400 undergraduate students. The questionnaire was used as tool for data collection. Structural equation model (SEM) was used for model verification. The objective of research was to develop the structural equation model of environmental education predicting green behavior through public mind. The finding showed that the confirmatory factor of exogenous variable of Environmental Education (EE) was able to explain the variation of endogenous factors of Public Mind (PM) predicting to Green Behavior (GB) with 88.00 percent. PM had the most effect to GB with effect of 0.78, and subsequence was EE with effect of 0.25. These can explain the variation of GB with 88.00 percent. Additionally, confirmatory factor EE can explain the variation of confirmatory factor of PM with 70.00 percent. Altering the green behavior of undergraduate students of Ubon Ratchathani Rajabhat University, the university should launch a program to develop their environmental public mind because public mind can play as an essential and powerful factor to create and develop their green behavior.