This study investigated the influence of certain human, work condition, and personal factors on primary and secondary school EFL teachers' work motivation. The research utilized four data collection instruments (e.g., profile form, semi-structured interviews, field-notes and diaries) to assure the validity of the study through triangulation. The participants of the study were comprised of nine primary and secondary school EFL teachers. The descriptive data from the intrinsic qualitative case study were sorted by means of semantic maps and analyzed by comparing their relatedness to prominent theories of motivation. The findings demonstrated that the main causes of demotivation were parents, administration, students, and working conditions, which proves that human and working condition variables had a higher impact on demotivation than personal variables.