This study aims to analyze and obtain comprehensive and objective description of recruiting process of educational supervisor, the role of educational supervisor, also to know the obstacles and supporting factors of educational supervisor roles to improve the education quality of secondary schools in Bima, West Nusa Tenggara. This is a qualitative approach with case study method. The data were collected through interviews, observation and document study. The phase of data analysis used by interactive model and componential analysis. The results showed: 1) the recruitment process of educational supervisor in Bima was not based on goverment rules and law. 2) monitoring of scholl programmes implementation by educational supervisor ran less optimal. 3) supervising by educational supervisor ran less optimal. 4) evaluating of school programmes undertaken by educational supervisor has ran well. 5) reporting about the results of monitoring, supervising, and evaluating, was done well. 6) the follow up of the results of supervision was not optimal. 7) some obstacles factors are: a) geographical area, b) highway access, c) facilities, d) mastery of information and technology, e) human resources. Then, some supporting factors are: a) operational funds form local government, b) vehicle, c) coaching, d) the involvement of communities, e) educational supervisor domicile, e) students, f) spirit of the educational supervisor itself