The present study aimed to design a model of factors affecting the quality of education for student-teachers at the Teacher Training University using the fuzzy Delphi technique. This research is applied in purpose and survey-based in nature. The statistical population consisted of education experts who were identified based on criteria such as expertise and experience in the relevant field. Eighteen of these experts participated in the current study. After reviewing the literature and conducting semi-structured interviews along with relevant coding, the initial model was designed. Then, to screen the indicators, the fuzzy Delphi technique was applied. In this technique, values above 0.7 were confirmed by the experts. The designed model includes 15 components of individual and social factors. Seven components fall under individual factors (classroom management, professional competence, educational assessment, education and specialization, commitment and motivation, teaching spirit, and communication skills), while eight components are under social factors (adherence to principles, social values, education and training, parental support, work environment, social communications, organizational flexibility, and collaboration and solidarity). This study showed that the quality of education for student-teachers at the Teacher Training University is influenced by various factors. Based on the findings of this study, considering both individual and social dimensions can provide a foundation for enhancing the quality of education provided to student-teachers.