The purpose of the current study was to develop and validate a scale to assess the inhibitors to reflective writing of Iranian English as a Foreign Language (EFL) teachers. The other aim of this study was to assess the reliability of the questionnaire. To prepare the first item pool of the questionnaire, the researchers reviewed the previous related literature and prepared the first item pool with 62 items. At the next stage, based on the judgments of some experts in the field regarding the items of the questionnaire, 31 items were deleted and the next draft included 31 items. Then, 265 EFL teachers were invited to fill out the questionnaire. As the next step, exploratory factor analysis (EFA) was conducted to investigate the construct validity of the scale. Based on the results of EFA, 10 items were deleted. The final draft of the questionnaire included 21 items with three factors including ‘teachers’ issues’, ‘students’ issues’, and ‘institutions and educational system issues’. In addition, a Cronbach’s alpha coefficient was run to measure the internal consistency of the scale and the findings indicated a satisfactory level of reliability. The findings have implications for pedagogy as well as further research.