Purpose: Medical teachers are prone to burnout, but wellbeing state protects against it. This study aimed to evaluate the wellbeing of medical teachers and identify associated factors. Methods: This cross-sectional study surveyed 174 active Indonesian medical teachers from 41 institutions using consecutive sampling. Data collected through online Google Forms included sociodemographic factors and wellbeing status assessed with the Indonesian version of the PERMA-Profiler questionnaire. The data analysis was performed using descriptive, bivariate non-parametric tests and post-hoc analysis. Results: The median overall wellbeing score was 8.00. Among nine wellbeing domains, accomplishment had the lowest score (median=7.67). Higher educational degree (p=0.048) and academic rank (p=0.024) were significantly associated with the accomplishment score. Age (p=0.006), educational degree (p=0.046), and teaching experience (p=0.037) were significantly associated with overall wellbeing. Conclusion: Despite a decent overall level of wellbeing, Indonesian medical teachers exhibited a low sense of accomplishment. Hence, both the government and medical institutions should establish supportive regulations and constructive faculty development programs to foster teachers’ professional identity formation and wellbeing. © The Korean Society of Medical Education.