This study aimed to identify the role of the educational institution in the concept of environmental education development at schools students grades 5-10 for basic education in the Sultanate of Oman, and to achieve this goal, the researcher collected data by using the questionnaire respondents, as a tool to measure the role of the educational institution, where the study population of schools and their assistants, teachers and supervisors managers, and numbered (10. 050) persons, while the sample of the study amounted to (970) individuals any proportion (10%) of the total community to study, researcher used the descriptive approach, The study focused questions as follows: What educational institution's role in the development of .1 the concept of environmental education to the students in grades 5-10 schools for basic in the Sultanate of Oman from the standpoint of respondents? 16 Are there any significant differences at the level of .2 significance (α 0,05) to estimate the respondents to the role of the institution in the development of the concept of environmental education to the students in grades 5- 10 schools for basic education in the Sultanate of Oman, due to the variables of the study: (type, functional experience, job title, educational qualification). ? What proposals and recommendations to activate the .3 role of the institution in the development of the concept of environmental education to the students in grades 5- 10 schools for basic education in the Sultanate of Oman? The study found a range of results, including: - Came estimate the educational institution's role in the development of the concept of environmental education from the viewpoint of high respondents in the study axes in the following order: (role of the teacher in the concept of environmental education development, the role of the school management in the concept of environmental education development, the role of curriculum in the concept of environmental education development and the role of the school environment in the development of the concept of environmental education, the role of community institutions 17 in the development of the concept of environmental education). - There are statistically significant differences at the significance level (0,05α) between the study sample of males and members of the study sample of female axes role of the educational institution for the benefit of the female sample due to the variable type. - There are statistically significant differences at the significance level (0,05α) between the study sample in qualification in the third axis variable, for the benefit of the owners of Master qualification or higher. In light of the findings the study recommended the need to intensify environmental education programs, through the adoption of environmental projects contribute to the concept of environmental education of the students development, and also cooperation between the school and other institutions of the local community in raising the level of environmental awareness among individuals, and to intensify the role of the media in environmental awareness, and work the inclusion of environmental problems in the curriculum, the study also recommended that interest in research and environmental studies in various educational stages