<ns4:p>This article was migrated. The article was not marked as recommended. Background: There has been an increasing number of articles that have studied the topic of medical professionalism. The aims of this study were to develop a scale of medical professionalism. Methods: The concepts of medical professionalism as defined by associations and groups of physicians, nurses and physiotherapists were investigated. The surveys using self-administered questionnaires were conducted on students and junior residents. An exploratory factor analysis, calculation of the coefficient alpha, and correlation coefficients with other scales were performed. Results:A factor analysis resulted in the extraction of 30 items in 7 factors as items of the Level 1 scale for pre-clinical level students. The correlation coefficients between the scores for the 7 factors and KiSS-18 were in the range of 0.23 - 0.76. The coefficient alpha of all 30 items was 0.90. A factor analysis resulted in the extraction of 31 items in 8 factors from the Level 2 scale for students at the time of graduation. The correlation coefficient between the scores for the 8 factor and "Reflective skills" of the P-MEX was 0.31 - 0.59. The coefficient alpha for all 30 items was 0.93. Conclusion: Construct validity, criterion-related validity and reliability were generally confirmed for the two scales.</ns4:p>